elixir course

dev.exs

config :discuss, Discuss.Repo,
  adapter: Ecto.Adapters.Postgres,
  username: "postgres_dev",
  password: "postgres_dev",
  database: "postgres_dev",
  hostname: "postgres_dev",
  pool_size: 10

docker-compose.yml

version: "3"
services:
  elixir:
    command: "sleep infinity"
    build: .
    volumes:
      - "./:/app"
      - "~/.ssh/id_rsa:/root/.ssh/id_rsa"
  postgres_dev:
    image: postgres:9.6
    environment:
      POSTGRES_USER: postgres_dev
      POSTGRES_PASSWORD: postgres_dev
      POSTGRES_DB: postgres_dev
    ports:
      - "54322:5432"

Dockerfile

FROM elixir:1.11
RUN wget https://github.com/phoenixframework/archives/raw/master/phoenix_new-1.2.5.ez && mix archive.install --force ./phoenix_new-1.2.5.ez && rm ./phoenix_new-1.2.5.ez

RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.37.2/install.sh | bash \
    && . ~/.bashrc \
    && nvm install 16.0 \
    && nvm use 16.0
    
RUN mkdir -p /root/.ssh \
    && ssh-keyscan -t rsa github.com >> ~/.ssh/known_hosts


WORKDIR /app

setup.sh

docker-compose up -d
docker-compose exec elixir bash

mix phoenix.new discuss
cd discuss
npm install
mix ecto.create