📅 30 Days Docker for DevOps Challenge (GitHub Friendly Plan)

Phase 1: Basics (Day 1–7)

👉 Fundamentals + Simple Hands-on

Day 1: – What is Docker? Install Docker on Linux

• Repo: day01-installation

• Files: README.md (notes), screenshot of version check

Day 2: – Hello World Container

• Run docker run hello-world

• Repo: day02-hello-world

Day 3: – Docker Images vs Containers

• Commands: docker ps, docker images

• Repo: day03-images-containers

Day 4: – Run Nginx Container (port mapping)

• docker run -d -p 8080:80 nginx

• Repo: day04-nginx-container

Day 5: – Volume Mount Basics

• Mount local HTML into nginx

• Repo: day05-volumes

Day 6: – Environment Variables

• Run MySQL with env vars

• Repo: day06-env-vars

Day 7: – Inspect Containers (logs, stats, exec)

• Repo: day07-container-inspect

Phase 2: Dockerfiles (Day 8–14)

👉 Building your own images

Day 8: – Write First Dockerfile (simple Node.js app)

• Repo: day08-dockerfile-node

Day 9: – Multi-stage Dockerfile (optimize size)

• Repo: day09-multi-stage

Day 10: – Add .dockerignore file

• Repo: day10-dockerignore

Day 11: – Tagging and pushing image to Docker Hub

• Repo: day11-dockerhub-push

Day 12: – Custom Python app with requirements.txt

• Repo: day12-python-app

Day 13: – Alpine based images (lightweight)

• Repo: day13-alpine-image

Day 14: – Automate build with script (build.sh)

• Repo: day14-build-script

Phase 3: Docker Compose (Day 15–21)

👉 Multi-container setup

Day 15: – Intro to Docker Compose (yaml basics)

• Repo: day15-compose-basic

Day 16: – Nginx + PHP app with Compose

• Repo: day16-php-nginx

Day 17: – MySQL + Adminer with Compose

• Repo: day17-mysql-adminer

Day 18: – WordPress + MySQL with Compose

• Repo: day18-wordpress

Day 19: – MongoDB + Express.js + React + Node (MERN) stack

• Repo: day19-mern-compose

Day 20: – Networks in Compose (bridge, host)

• Repo: day20-compose-networks

Day 21: – Volumes in Compose (persistent data)

• Repo: day21-compose-volumes

Phase 4: DevOps Integration (Day 22–30)

👉 Real DevOps-focused projects

Day 22: – Docker Logs + Monitoring (docker stats)

• Repo: day22-monitoring

Day 23: – Docker Healthcheck in Dockerfile

• Repo: day23-healthcheck

Day 24: – Private Docker Registry setup

• Repo: day24-private-registry

Day 25: – CI/CD with GitHub Actions (build & push image)

• Repo: day25-github-actions

Day 26: – Reverse Proxy with Nginx + 2 services

• Repo: day26-reverse-proxy

Day 27: – Local Dev Environment using Docker

• Repo: day27-local-dev

Day 28: – Docker Swarm Basics (init, join, scale)

• Repo: day28-swarm-basics

Day 29: – Deploy sample app on Swarm cluster

• Repo: day29-swarm-deploy

Day 30: – Final Project:

• Monitoring Dashboard with ELK stack (Elasticsearch, Logstash, Kibana) on Docker

• Repo: day30-elk-stack