Tools & Build Systems

Tutorials covering the tools that developers use every day — version control, editors, build systems, package managers, containers, and the command-line utilities that make work faster. Each chapter is standalone, built around real examples and verified commands.

Bun 01 ⚡ Introduction to Bun: All-in-One Runtime, Bundler, and Package Manager Docker 1 🐳 Containerization Fundamentals: Containers vs Virtual Machines (VMs)Git 1a 🧩 Git Fundamentals Understanding Version Control Git 1b 🧩 Installing Git Git 1c 🧩 Initial Git Configuration Git 1d 🧩 The Git Workflow Local Repository 🧩GitHub 01 🌐 What is GitHub and Git vs GitHub GitLab 01 🦊 Introduction to GitLab and the DevSecOps Platform npm 01 🌐 What is npm and Node Modules pnpm 01 📦 Introduction to pnpm and Content-Addressable Store Architecture Yarn 01 🧶 Introduction to Yarn vs npm Bun 02 ⚡ Installing Bun and Managing Global Versions Docker 2 🐳 Docker Engine Architecture: Daemon (dockerd), CLI (docker), containerd, and runC Git 2a🧩 Introduction to Remote Repositories Git 2b 🧩 Connecting Local to Remote GitHub 02 🌐 Creating a GitHub Account and Setting Up Profile GitLab 02 🦊 Setting Up Projects, Groups, and Subgroup Hierarchy npm 02 🌐 Installing, Updating, and Versioning Node.js & npm pnpm 02 📦 Installing pnpm and Managing Versions via Corepack Yarn 02 🧶 Installing and Upgrading Yarn Bun 03 ⚡ Initializing Projects and package.json Integration Docker 3 🐳 Linux Kernel Isolation Mechanics: Namespaces (PID, NET, MNT, IPC, UTS, USER)Git 3a 🧩 Understanding Branches Git 3b 🧩 Basic Branch Commands Git 3c 🧩 Resolving Merge Conflicts GitHub 03 🌐 SSH Keys and Personal Access Tokens (PATs) Authentication GitLab 03 🦊 Managing SSH Keys and Personal Access Tokens (PATs)npm 03 🌐 Initializing Projects (npm init & npm init -y)pnpm 03 📦 Initializing Projects and package.json Setup Yarn 03 🧶 Initializing Projects and package.json Bun 04 ⚡ Installing Dependencies with Bun's Ultra-Fast Lockfile (bun.lockb)Docker 4 🐳 Resource Control and Limits: Linux Control Groups (cgroups v1 vs cgroups v2)Git 4a 🧩 Rebasing Git 4b 🧩 Stashing Changes Git 4c 🧩 Cherry Picking Git 4d 🧩 Tagging Releases Git 4e 🧩 Ignoring Files Git 4f 🧩 Forking and Pull Requests GitHub 04 🌐 Creating and Initializing a Repository (Public vs Private)GitLab 04 🦊 Working with Repositories, Branches, and Protected Branches npm 04 🌐 The package.json File Breakdown pnpm 04 📦 Hard Links, Symbolic Links, and the pnpm Virtual Store (.pnpm)Yarn 04 🧶 Managing Dependencies and yarn.lock Bun 05 ⚡ Managing Packages: Add, Remove, and Update Operations Docker 5 🐳 Installing Docker Engine on Linux, macOS, and Windows (WSL2 Architecture)Git 5 🧩 Git Best Practices 🧩 Troubleshooting GitHub 05 🌐 README.md, Markdown Basics, and Repository Documentation GitLab 05 🦊 Creating, Reviewing, and Merging Merge Requests (MRs)npm 05 🌐 Installing Packages (dependencies vs devDependencies)pnpm 05 📦 Managing Dependencies: Add, Update, and Remove Operations Yarn 05 🧶 Adding, Upgrading, and Removing Packages Bun 06 ⚡ Running Scripts and Executing Binaries via bun run and bunx Docker 6 🐳 Docker CLI Core Commands: docker run, docker ps, docker stop, docker rm Git 6 🧩 Beyond the Command Line GitHub 06 🌐 Pushing Local Code to GitHub (git remote and git push)GitLab 06 🦊 Resolving Merge Conflicts and Handling Code Reviews npm 06 🌐 Understanding Semantic Versioning (SemVer: Major, Minor, Patch)pnpm 06 📦 Strict Dependency Trees and Hoisting Limitations (symlinks vs flat node_modules)Yarn 06 🧶 Running Scripts and Executing Binaries Bun 07 ⚡ Running JavaScript, TypeScript, and JSX Files Natively Without Transpilation Docker 7 🐳 Managing Container Lifecycles: Pause, Unpause, Restart, and Signal Handling (SIGTERM, SIGKILL)Git 7 🧩 Git Cheatsheet GitHub 07 🌐 Clones and Forks: Working with Remote Repositories GitLab 07 🦊 Issue Tracking, Epics, Milestones, and Kanban Boards npm 07 🌐 package-lock.json vs package.json pnpm 07 📦 Running Scripts and Executing Binaries with pnpm run and pnpm dlx Yarn 07 🧶 Yarn Workspaces and Monorepos Bun 08 ⚡ Bun's Built-in SQLite Database API (bun:sqlite)Docker 8 🐳 Container Exec, Logs, and Interactive Shells: docker exec, docker logs, docker attach Git 8 🧩 Git Test Q&As GitHub 08 🌐 GitHub Issues, Labels, Milestones, and Templates GitLab 08 🦊 Introduction to GitLab CI/CD and Pipeline Architecture npm 08 🌐 Global vs Local Package Installation (-g flag)pnpm 08 📦 pnpm Workspaces and Monorepo Architecture Management Yarn 08 🧶 Plug'n'Play (PnP) Architecture Bun 09 ⚡ Building Fast HTTP Servers with Bun.serve()Docker 9 🐳 Inspecting Container Metadata: docker inspect, docker stats, and docker top Git 9 🧩 full 🧩 2 hours GitHub 09 🌐 Pull Requests (PRs) Basics and Draft PRs GitLab 09 🦊 Writing Your First .gitlab-ci.yml Pipeline Configuration npm 09 🌐 Running Executables with npx pnpm 09 📦 Filtering Workspaces and Running Parallel Tasks Yarn 09 🧶 Zero-Installs Configuration Bun 10 ⚡ File System Operations and Streams with Bun's Native APIs Docker 10 🐳 Understanding Container File Systems: Read-Only Layers, Copy-on-Write (CoW), and Ephemeral Storage GitHub 10 🌐 Code Reviews, Comments, and Review Approvals GitLab 10 🦊 Stages, Jobs, and Execution Flow in GitLab CI/CD npm 10 🌐 Managing npm scripts (start, test, custom scripts)pnpm 10 📦 Offline Mode and Caching Best Practices in pnpm Yarn 10 🧶 Configuring Yarn with .yarnrc.yml Bun 11 ⚡ Writing and Running Unit Tests with Bun's Native Test Runner Docker 11 🐳 Docker Images Fundamentals: Image Manifests, Content Addressable Storage, and Layers GitHub 11 🌐 Merging PRs: Merge, Squash, and Rebase Strategies GitLab 11 🦊 Caching and Artifacts: Passing Data Between Pipeline Jobs npm 11 🌐 Lifecycle Scripts (pre, post, prepare, prepublishOnly)pnpm 11 📦 Configuring pnpm with .npmrc and pnpmfile.js Yarn 11 🧶 Offline Caching and Mirroring Bun 12 ⚡ Bundling Applications for Production with bun build Docker 12 🐳 Pulling, Tagging, and Pushing Images to Docker Hub and Private Registries GitHub 12 🌐 Branch Protection Rules and CODEOWNERS GitLab 12 🦊 Using needs for Directed Acyclic Graph (DAG) Pipelines npm 12 🌐 Environment Variables in npm Scripts pnpm 12 📦 Patches and Overrides: Customizing Third-Party Dependencies Yarn 12 🧶 Patching Dependencies and yarn patch Bun 13 ⚡ CI/CD Integration with Immutable and Offline Installs Docker 13 🐳 Writing your First Dockerfile: FROM, RUN, CMD, and ENTRYPOINT Mechanics GitHub 13 🌐 Managing Project Boards and GitHub Projects (v2)GitLab 13 🦊 Controlling Job Execution with rules, only, and except npm 13 🌐 Updating, Auditing, and Removing Packages (npm update, npm audit, npm uninstall)pnpm 13 📦 CI/CD Integration with pnpm install --frozen-lockfile Yarn 13 🧶 Publishing Packages to Registries Bun 14 ⚡ Migrating Existing Node.js, Express, or Next.js Projects to Bun Docker 14 🐳 CMD vs ENTRYPOINT: Exec Form vs Shell Form and Override Behaviors GitHub 14 🌐 GitHub Releases, Tags, and Versioning GitLab 14 🦊 Managing CI/CD Environment Variables and Secure Secrets npm 14 🌐 Creating and Setting Up an npm Account pnpm 14 📦 Publishing Packages and Managing Scoped Registries Yarn 14 🧶 CI/CD Integration and Immutable Installs Bun 15 ⚡ Cheat Sheet Docker 15 🐳 Managing Files inside Dockerfiles: COPY vs ADD (Auto-extraction & Remote URLs)GitHub 15 🌐 GitHub Pages: Hosting Static Sites GitLab 15 🦊 Registering and Configuring Self-Hosted GitLab Runners npm 15 🌐 Structuring a Package for Publishing (main, module, types, exports)pnpm 15 📦 Migrating Existing Projects from npm or Yarn to pnpm Yarn 15 🧶 Migrating from npm to Yarn Docker 16 🐳 Setting Environment Variables and Working Directories: ENV, ARG, and WORKDIR GitHub 16 🌐 .github Directory and Repository Templates GitLab 16 🦊 Building and Publishing Container Images with GitLab Registry npm 16 🌐 .npmignore vs .gitignore and files Field pnpm 16 📦 Cheat Sheet Yarn 16 🧶 Cheatsheet Docker 17 🐳 Container User Security: USER Instruction and Running as Non-Root GitHub 17 🌐 GitHub Actions Fundamentals and Workflow Files GitLab 17 🦊 Automated Testing, Code Quality, and Coverage Reports npm 17 🌐 Version Management (npm version patch|minor|major)Docker 18 🐳 Exposing Ports and Network Metadata: EXPOSE vs Host Port Mapping (-p)GitHub 18 🌐 GitHub Actions CI/CD Pipeline Automation GitLab 18 🦊 DevSecOps Scanning: SAST, Secret Detection, and Dependency Scanning npm 18 🌐 Publishing Public and Private Packages (npm publish, --access public)Docker 19 🐳 Docker Build Context Optimization and .dockerignore Best Practices GitHub 19 🌐 GitHub Packages and Container Registry (GHCR)GitLab 19 🦊 Deploying Applications to Environments (Staging and Production)npm 19 🌐 Managing Package Tags (npm dist-tag)Docker 20 🐳 Caching Mechanisms in Docker Builds: Layer Reuse and Cache Busting Strategies GitHub 20 🌐 GitHub Dependabot and Automated Security Alerts GitLab 20 🦊 GitOps Workflows and Kubernetes Cluster Integrations npm 20 🌐 Unpublishing, Deprecating, and Transferring Packages Docker 21 🐳 Multi-Stage Builds: Reducing Image Sizes from Gigabytes to Megabytes GitHub 21 🌐 GitHub Secret Scanning and CodeQL Analysis GitLab 21 🦊 Managing Project Permissions, Roles, and Access Control npm 21 🌐 Local Testing with npm link and npm pack Docker 22 🐳 Multi-Stage Pattern: Building Standalone Go, Rust, or Node.js Binaries for Distroless/Scratch GitHub 22 🌐 Managing GitHub Organizations, Teams, and Permissions GitLab 22 🦊 Webhooks, API Integration, and System Automation npm 22 🌐 Configuration Management (.npmrc File & Registry Config)Docker 23 🐳 Minimal Base Images Comparison: alpine, debian-slim, scratch, and distroless GitHub 23 🌐 GitHub CLI (gh) Usage and Terminal Workflows GitLab 23 🦊 Project Analytics, Value Stream Management, and Productivity Metrics npm 23 🌐 Scoped Packages (@org/package)Docker 24 🐳 Advanced Buildkit Features: Secret Mounts (--mount=type=secret) and SSH Forwarding GitHub 24 🌐 GitHub Copilot and AI Integration Workflow GitLab 24 🦊 Migrating Repositories and Issues from GitHub or Bitbucket to GitLab npm 24 🌐 npm Workspaces (Monorepos)Docker 25 🐳 BuildKit Cache Mounts: Accelerating Package Manager Caches (npm, pip, apt, cargo)GitHub 25 🌐 Cheatsheet GitLab 25 🦊 Cheat Sheet npm 25 🌐 Security Best Practices & Token Management (npm audit fix, Access Tokens)Docker 26 🐳 Persistent Storage Overview: Bind Mounts vs Docker Volumes vs tmpfs npm 26 🌐 Overrides and Peer Dependencies (overrides, peerDependencies)Docker 27 🐳 Managing Docker Volumes: docker volume create, inspect, ls, and prune npm 27 🌐 Cheatsheet Docker 28 🐳 Volume Drivers and Storage Plugins: Local, NFS, and Cloud-Native Storage Docker 29 🐳 Read-Only Containers (--read-only) and Mounting Temporary In-Memory File Systems Docker 30 🐳 Storage Drivers Deep Dive: Overlay2 Architecture, Inodes, and Performance Benchmarks Docker 31 🐳 Container Networking Architecture: Bridge, Host, None, and Macvlan Drivers Docker 32 🐳 Default Bridge Network vs User-Defined Bridge Networks and DNS Resolution Docker 33 🐳 Host Networking (--net=host): Performance, Security, and Port Collisions Docker 34 🐳 Macvlan and IPvlan Networks: Exposing Containers directly to Physical LAN Subnets Docker 35 🐳 Container Port Forwarding Mechanics: iptables Rules, NAT, and docker-proxy Docker 36 🐳 Container Healthchecks: HEALTHCHECK Instruction, Exit Codes, and Auto-healing Policies Docker 37 🐳 Restart Policies: no, on-failure, always, and unless-stopped Docker 38 🐳 Container Resource Allocations: CPU Shares, CPU Quotas (--cpus), and Memory Limits (--memory)Docker 39 🐳 Out-Of-Memory (OOM) Killer Behaviors and OOM Score Adjustments in Containers Docker 40 🐳 Introduction to Docker Compose: Multi-Container Orchestration via Declarative YAML Docker 41 🐳 Docker Compose Specification: services, networks, volumes, and environment Docker 42 🐳 Service Dependencies and Startup Ordering: depends_on with Healthcheck Conditions Docker 43 🐳 Scaling Compose Services, Dynamic Load Balancing, and Environment Variable Substitution Docker 44 🐳 Docker Compose Profiles, Overrides (docker-compose.override.yml), and Inheritance Docker 45 🐳 Managing Microservices Environments locally with Docker Compose and Live Reloading Docker 46 🐳 Container Logging Drivers: json-file, journald, syslog, fluentd, and Log Rotation Policies Docker 47 🐳 Centralized Log Aggregation: Shipping Docker Container Logs to ELK / Grafana Loki Docker 48 🐳 Monitoring Containers with Prometheus, cAdvisor, and Grafana Dashboards Docker 49 🐳 Docker Daemon Configuration: Customizing /etc/docker/daemon.json Docker 50 🐳 Docker Cleanup Automation: docker system prune, Image Pruning, and Disk Space Audits Docker 51 🐳 Docker Image Vulnerability Scanning: Trivy, Grype, and Docker Scout Docker 52 🐳 Container Security Hardening: Dropping Linux Capabilities (--cap-drop=ALL)Docker 53 🐳 Enforcing Linux Security Modules: AppArmor Profiles and SELinux Labels for Containers Docker 54 🐳 Restricting System Calls: Custom Seccomp Profiles in Docker Engine Docker 55 🐳 User Namespaces Mapping (userns-remap): Mapping Container Root to Host Unprivileged User Docker 56 🐳 Container Image Signing and Verification: Docker Content Trust (DCT) and Cosign Docker 57 🐳 Rootless Docker Architecture: Running Docker Engine without Root Privileges Docker 58 🐳 Secret Management in Docker Compose and Swarm: Avoiding Hardcoded Environment Credentials Docker 59 🐳 Multi-Platform Image Builds: docker buildx and QEMU Cross-Compilation Architecture Docker 60 🐳 Creating Open Container Initiative (OCI) Multi-Arch Manifest Lists (amd64, arm64)Docker 61 🐳 Setting Up Private Container Registries: Harbor, Nexus, and Docker Registry Server Docker 62 🐳 Private Registry Authentication, TLS Encryption, and Garbage Collection Docker 63 🐳 Docker Swarm Architecture: Manager Nodes, Worker Nodes, and Raft Consensus Protocol Docker 64 🐳 Swarm Service Deployment: Tasks, Replicas, Global Mode, and Rolling Updates Docker 65 🐳 Swarm Overlay Networks: VXLAN Encapsulation and Ingress Routing Mesh Docker 66 🐳 Swarm Secrets and Configs: Native Encrypted State Distribution Across Cluster Nodes Docker 67 🐳 High Availability Homelab / Server Deployment with Docker Swarm and Portainer Docker 68 🐳 Transitioning from Docker Compose to Kubernetes: Objects, Pods, and Architecture Differences Docker 69 🐳 Translating Compose Manifests to Kubernetes Objects using kompose Docker 70 🐳 containerd CLI Integration: Interacting directly via ctr and nerdctl Docker 71 🐳 Open Container Initiative (OCI) Specifications: Image Spec, Runtime Spec, and Distribution Spec Docker 72 🐳 Alternative Container Runtimes: CRI-O, Podman (Podman vs Docker Differences)Docker 73 🐳 Podman Desktop, Rootless Pods, and Generating Kubernetes Manifests from Pods Docker 74 🐳 Sandboxed & Secure Runtimes: gVisor (runsc) and Kata Containers (MicroVM Isolation)Docker 75 🐳 Docker API: Interacting with Docker Engine Daemon REST API via HTTP / Unix Socket Docker 76 🐳 Automating Docker Management using Python (docker-py) and Go SDK Docker 77 🐳 Custom Docker CLI Plugins: Extending Docker Functionality with Custom Binaries Docker 78 🐳 Containerizing Database Engines: PostgreSQL, MySQL, Redis (Persisting Data & Performance)Docker 79 🐳 Containerizing Web Servers and Reverse Proxies: Nginx, Caddy, and Traefik Dynamic Routing Docker 80 🐳 Containerizing Node.js, Express, and Fastify Applications for Production Docker 81 🐳 Containerizing Python, FastAPI, and Django Applications with Gunicorn/Uvicorn Docker 82 🐳 Containerizing Compiled Applications: Go, Rust, and C++ Binaries Docker 83 🐳 Local Development Stacks: Dev Containers (.devcontainer) and VS Code Integration Docker 84 🐳 Continuous Integration Pipelines: Building and Testing Docker Images in GitHub Actions Docker 85 🐳 CI/CD Pipeline Caching: GitHub Actions Cache Layer Optimization for Docker Docker 86 🐳 Docker-in-Docker (DinD) vs Docker-outside-of-Docker (DooD) in CI Runners Docker 87 🐳 GitOps Workflows for Container Deployments using Watchtower and ArgoCD Docker 88 🐳 Reverse Proxying Docker Containers with Automatic SSL/TLS via Traefik & Let's Encrypt Docker 89 🐳 Backup and Disaster Recovery Strategies for Docker Volumes and Container States Docker 90 🐳 Networking Deep Dive: Packet Flow Tracking through iptables, NAT, and veth Pairs Docker 91 🐳 Debugging Networking Issues: tcpdump, nsenter, and Inspecting Container Network Namespaces Docker 92 🐳 Storage Performance Tuning: I/O Bottlenecks, Direct I/O, and Benchmark Tooling inside Containers Docker 93 🐳 Kernel Resource Auditing: Tracing System Calls inside Containers using strace and eBPF Docker 94 🐳 Debugging Ephemeral / Crashed Containers: Debugging Distroless Containers with Ephemeral Containers Docker 95 🐳 Reverse Engineering Docker Images: Extracting Dockerfiles using dive and Layer Inspection Docker 96 🐳 Docker Engine Benchmarking: CIS Docker Benchmark Verification and Compliance Auditing Docker 97 🐳 High-Performance Docker Host Tuning: Kernel Sysctl Parameters, File Descriptors, and Ephemeral Ports Docker 98 🐳 Building Custom OCI Compliant Runtimes or Custom Images from Scratch Docker 99 🐳 Zero-Downtime Rolling Deployments and Blue-Green Container Deployment Patterns Docker 100 🐳 Docker Master Class: Hand-Tracing a Packet from Physical NIC through Bridge to Container App Core Docker 101 🐳 Cheatsheet

Programming | Docker | Tools & Build Systems

Docker 97 🐳 High-Performance Docker Host Tuning: Kernel Sysctl Parameters, File Descriptors, and Ephemeral Ports
ByKandZ October 22, 2026October 22, 2026

High-throughput Docker workloads fail at the host layer before they reach the application layer. The default Linux kernel is configured for balanced desktop and general-purpose server use, not for tens of thousands of concurrent connections. The three parameters that most often become the bottleneck are the file descriptor limit, the ephemeral port range, and the…

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Programming | Docker | Tools & Build Systems

Docker 98 🐳 Building Custom OCI Compliant Runtimes or Custom Images from Scratch
ByKandZ October 22, 2026October 22, 2026

The OCI specification defines two independent standards that are often confused: the Runtime Specification describes how to configure and execute a container (the config.json and the lifecycle), and the Image Specification describes how to package a filesystem and its metadata. Building a custom runtime means implementing the former; building a custom image means producing the…

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Programming | Docker | Tools & Build Systems

Docker 99 🐳 Zero-Downtime Rolling Deployments and Blue-Green Container Deployment Patterns
ByKandZ October 22, 2026October 22, 2026

Zero-downtime deployment is not a single technique but a family of patterns that share one requirement: the old version must keep serving traffic until the new version is proven ready. The two patterns that matter most in Docker environments are rolling updates, which replace replicas incrementally, and blue-green, which runs two complete environments and switches…

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Programming | Docker | Tools & Build Systems

Docker 100 🐳 Docker Master Class: Hand-Tracing a Packet from Physical NIC through Bridge to Container App Core
ByKandZ October 22, 2026October 22, 2026

This chapter traces a single TCP SYN packet from the moment it arrives on the host’s physical network interface to the moment it is delivered to the application listening inside a container. The path is not a straight line. It crosses the host’s network stack, passes through the Netfilter framework where Docker’s NAT rules rewrite…

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Programming | Docker | Tools & Build Systems

Docker 101 🐳 Cheatsheet
ByKandZ October 22, 2026October 22, 2026

A quick-reference for Docker commands, concepts, and internals. Organized for lookup, not for reading. Container Lifecycle Command Purpose docker run <image> Create + start container docker run -d <image> Detached (background) docker run -it <image> sh Interactive with TTY docker run –rm <image> Auto-remove on exit docker run –name foo <image> Named container docker start…

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