This is currently a work in progess 24/5/2025

Set up

backend container

docker build -t bubble-plot .

docker run -d -p 127.0.0.1:3000:3000 bubble-plot

-d is run in the background

-p is for port mapping between the host and the container

access a docker image cli in alpine linux

docker exec -it <container_name_or_id> sh

Postgres container

Run a PostgreSQL container

docker run -d --name pg-bubble-plot --network bubble-plot --network-alias psql -v bubble-plot-psql-data:/var/lib/postgresql/data -e POSTGRES_PASSWORD=secret -e POSTGRES_USER=root -e POSTGRES_DB=bubbleplot postgres:15

connect to 

docker exec -it 2755f157a2af  psql -U root -d bubbleplot

Creates a container named my-postgres

Sets the POSTGRES_PASSWORD to mysecretpassword

Maps port 5432 on your machine to the container

Runs the container in the background (-d)

Set up a PostgreSQL container with a persistent volume.

Start another container

Connect the second container to the PostgreSQL container using Docker networking.

Create a Docker network This allows both containers to communicate by name.

docker network create my-network Run PostgreSQL with a volume and on the same network

docker run -d
--name my-postgres
--network my-network
-e POSTGRES_PASSWORD=mysecretpassword
-e POSTGRES_USER=myuser
-e POSTGRES_DB=mydatabase
-v pgdata:/var/lib/postgresql/data
postgres Explanation:

--network my-network: joins the network

-v pgdata:/var/lib/postgresql/data: persistent volume

use my-postgres as the hostname to connect from other containers.

Run another container and connect to Postgres

bash Copy Edit docker run -it --rm
--network my-network
postgres psql -h my-postgres -U myuser -d mydatabase

bash Copy Edit docker run -it --rm
--network my-network
-v "$PWD":/app -w /app
node:18
node your-app.js And in your app, connect to Postgres using:

js Copy Edit const client = new Client({ host: 'my-postgres', user: 'myuser', password: 'mysecretpassword', database: 'mydatabase', }); bash Copy Edit docker volume ls To inspect the volume:

bash Copy Edit docker volume inspect pgdata

example yaml file

version: '3.8'

version: '3.8'

services: db: image: postgres:15 container_name: my-postgres environment: POSTGRES_USER: myuser POSTGRES_PASSWORD: mysecretpassword POSTGRES_DB: mydatabase volumes: - pgdata:/var/lib/postgresql/data networks: - app-network

app: build: context: . dockerfile: Dockerfile container_name: my-node-app volumes: - ./:/app working_dir: /app command: node index.js networks: - app-network depends_on: - db

volumes: pgdata:

networks: app-network: