This project was basically from solutions to exercise of course https://devopswithdocker.com/. A frontend app which built on React, which accept request on port 5000. A backend app built on Go language, which accepts connections on port 8080. A SQL database server 'postgresql' and in-memory database 'redis' is connected to the backend server. Nginx will function as a reverse proxy. The requests arriving at anything other than /api will be redirected to frontend container and /api will get redirected to backend container. At the end the frontend is accessible simply by going to http://localhost. See the project diagram for understanding the app architecture.

• Please make sure docker engine install in the system; go throuh official documentation: [https://docs.docker.com/engine/install/]

• Also installed docker-compose in the system; Go throuh official documentation: [https://docs.docker.com/compose/install/]

• Run with Docker Compose

  $ docker-compose up -d
  $ docker-compose ps
  # To stop the containers
  $ docker-compose down

• Go to http://localhost

• Frontend written in React
• Backend written in Go
• PostgreSQL database connected to the Backend
• In-memory database Redis to the Backend
• Nginx as a Reverse Proxy

• Ex-1.12: Create a Dockerfile for Frontend and listens on port 5000
• Ex-1.13: Create a Dockerfile for Backend and listens on port 8080
• Ex-1.14: Exposed ports for frontend and backend correctly and frontend gets response from backend api when talk to browser
• Ex-2.3: Configure the backend and frontend to work in docker-compose.
• Ex-2.4: Using Docker Networking, redis is connected to the backend as docker container
• Ex-2.6: connected to a postgres database to save messages. postgreql starts as docker container and configured to docker-compose file.
• Ex-2.8: Add Nginx which will function as a reverse proxy (see the image above). The requests arriving at anything other than /api will be redirected to frontend container and /api will get redirected to backend container.
• Ex-2.9-2.10: Complete all configurations on docker-compose so that the app start when "docker-compose up" command given and all services are accesible.
• Ex-3.3: For security reasons, removed the root access and make sure the containers start their processes as a non-root user.
• Ex-3.4-3.5: Optimize the size of the images
• Ex-3.6: Multi-stage build for the backend app