Dockerize Application, and spin up together with a Redis instance into a docker-compose

[tenongene]

version: "3.9"
services: 
  web:
    build: .
    ports:
      - 7575:7575
    depends_on:
      - db

  db:
    image: "redis:7-alpine"
    ports: 
      - 6379:6379
    restart: always
    volumes:
      - ./data:/data
    command: ["redis-server", "--save 60 1", "--loglevel warning"]

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• Docker-compose.yaml file to spin up both containers.
• Will be on the same network automatically.
• Mapped a local volume to save data from redis container in the event the container crashes.

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• Docker containers have a built-in DNS server and containers can be resolved by their hostname.
• Thus refactoring connection code snippet to reach the redis db container with the "db" name defined in the docker-compose file

[tenongene]

FROM node:alpine3.16
WORKDIR /visitor_count_app
COPY . .
RUN npm install
EXPOSE 7575
CMD ["npx", "nodemon"]

• Prepared a Dockerfile that will build the application in docker-compose

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Executing docker-compose with build

[tenongene]

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Application running in docker.