Creates a docker-compose for ease of local standups.

Dockerfile.dev

@@ -0,0 +1,14 @@
+# Used by docker-compose.yml
+FROM hexpm/elixir:1.12.0-erlang-24.0.1-debian-bullseye-20210902-slim
+
+RUN DEBIAN_FRONTEND=noninteractive apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends build-essential dialog apt-utils gpg-agent \
+    apt-transport-https software-properties-common git curl postgresql-client inotify-tools && \
+    mix local.hex --force && \
+    mix archive.install hex phx_new 1.6.7 --force && \
+    mix local.rebar --force && \
+    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+WORKDIR /app
+COPY . .
+EXPOSE 4000
+CMD /bin/sh -c "while sleep 1000; do :; done"

config/runtime.exs

@@ -11,6 +11,30 @@ if System.get_env("PHX_SERVER") && System.get_env("RELEASE_NAME") do
   config :live_beats, LiveBeatsWeb.Endpoint, server: true
 end
 
+# Used by Dockerfile.dev.
+if System.get_env("DEV_CONTAINER") do
+  database_url =
+    System.get_env("DATABASE_URL") ||
+      raise """
+      environment variable DATABASE_URL is missing.
+      For example: ecto://USER:PASS@HOST/DATABASE
+      """
+
+  replica_database_url =
+    System.get_env("REPLICA_DATABASE_URL") || database_url
+
+  config :live_beats, LiveBeats.Repo,
+    url: database_url,
+    show_sensitive_data_on_connection_error: true,
+    pool_size: 10
+
+  config :live_beats, LiveBeats.ReplicaRepo,
+    url: replica_database_url,
+    show_sensitive_data_on_connection_error: true,
+    pool_size: 10,
+    priv: "priv/repo"
+end
+
 if config_env() == :prod do
   database_url =
     System.get_env("DATABASE_URL") ||

docker-compose.yml

@@ -0,0 +1,31 @@
+version: "3"
+services:
+  web:
+    container_name: "live_beats_dev"
+    build:
+      context: .
+      dockerfile: Dockerfile.dev
+    environment:
+      # Review the readme on how to register a github oauth app.
+      LIVE_BEATS_GITHUB_CLIENT_ID: "FIX_ME"
+      LIVE_BEATS_GITHUB_CLIENT_SECRET: "FIX_ME"
+      DEV_CONTAINER: "true"
+      DATABASE_URL: "ecto://postgres:postgres@db/live_beats_dev"
+    depends_on:
+      - db
+    ports:
+      - "4000:4000"
+  db:
+    container_name: "live_beats_data"
+    image: "postgres:14.2"
+    command: postgres -c shared_preload_libraries=pg_stat_statements -c pg_stat_statements.max=10000 -c pg_stat_statements.track=all
+    environment:
+      POSTGRES_DB: "live_beats_dev"
+      POSTGRES_HOST_AUTH_METHOD: "trust"
+    ports:
+      - "5432:5432"
+    volumes:
+      - data:/var/lib/postgresql/data
+volumes:
+  data:
+    driver: local