chore(docker): set up docker-compose toolchain

- config: move DATABASE_URL to runtime env var

.dockerignore

@@ -1,2 +1,3 @@
 ./bullion/_build
-./bullion/deps
+./bullion/deps
+./bullion/assets/node_modules

.gitignore

@@ -1 +1,2 @@
+.env
 .idea

Dockerfile

@@ -12,18 +12,18 @@ WORKDIR /app
 # By using --force, we don’t need to type “Y” to confirm the installation
 RUN mix local.hex --force
 
-# Compile the project
-ARG database_url
-ENV DATABASE_URL=${database_url}
-
 ARG secret_key
 ENV SECRET_KEY_BASE=${secret_key}
 
-ENV MIX_ENV prod 
-ENV PORT 4001
+ARG mix_env
+ENV MIX_ENV=${mix_env} 
+
 RUN mix local.rebar --force
-RUN mix deps.get --only prod
+ARG deps_postfix
+RUN mix deps.get ${deps_postfix}
 
 RUN mix do compile
 
+RUN mix phx.digest
+
 CMD mix phx.server

bullion/config/dev.exs

@@ -2,13 +2,8 @@ use Mix.Config
 
 # Configure your database
 config :bullion, Bullion.Repo,
-  username: "postgres",
-  password: "postgres",
-  database: "bullion",
-  hostname: "localhost",
   show_sensitive_data_on_connection_error: true,
-  pool_size: 10,
-  port: 54320
+  pool_size: 10
 
 # For development, we disable any cache and enable
 # debugging and code reloading.

bullion/config/prod.secret.exs

@@ -4,16 +4,8 @@
 # remember to add this file to your .gitignore.
 use Mix.Config
 
-database_url =
-  System.get_env("DATABASE_URL") ||
-    raise """
-    environment variable DATABASE_URL is missing.
-    For example: ecto://USER:PASS@HOST/DATABASE
-    """
-
 config :bullion, Bullion.Repo,
   # ssl: true,
-  url: database_url,
   pool_size: String.to_integer(System.get_env("POOL_SIZE") || "10")
 
 secret_key_base =

bullion/lib/bullion/repo.ex

@@ -2,4 +2,10 @@ defmodule Bullion.Repo do
   use Ecto.Repo,
     otp_app: :bullion,
     adapter: Ecto.Adapters.Postgres
+
+  def init(_, config) do
+    config = config
+      |> Keyword.put(:url, System.get_env("DATABASE_URL"))
+    {:ok, config}
+  end
 end

docker-compose.prod.yaml

@@ -0,0 +1,29 @@
+version: "3"
+
+services:
+  web:
+    build: 
+      context: .
+      args:
+        mix_env: prod
+        secret_key: ${SECRET_KEY}
+        deps_postfix: "--only prod"
+    image: "bullion:0.1.0"
+    ports:
+      - "4000:4000"
+    environment:
+      - PORT=4001
+      - DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@db/${POSTGRES_DB}
+  db:
+    container_name: "bullion-db"
+    environment:
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_DB=${POSTGRES_DB}
+    volumes:
+      - bullion-db:/var/lib/postgresql/data
+    expose:
+      - "5432"
+volumes:
+  bullion-db:
+    driver: local

docker-compose.yaml

@@ -1,16 +1,23 @@
 version: "3"
+
 services:
-#  Create a service named db.
+  web:
+    build: 
+      context: .
+      args:
+        mix_env: dev
+    image: "bullion:0.1.0.dev"
+    ports:
+      - "4000:4000"
+    environment:
+      - PORT=4001
+      - DATABASE_URL=postgresql://postgres:postgres@db/bullion
   db:
-#   Use the Docker Image postgres. This will pull the newest release.
-    image: "postgres"
-#   Give the container the name my_postgres. You can changes to something else.
+    image: "postgres:12"
     container_name: "bullion-db"
-#   Setup the username, password, and database name. You can changes these values.
     environment:
       - POSTGRES_USER=postgres
       - POSTGRES_PASSWORD=postgres
       - POSTGRES_DB=bullion
-#   Maps port 54320 (localhost) to port 5432 on the container. You can change the ports to fix your needs.
-    ports:
-      - "54320:5432"
+    expose:
+      - "5432"

rsync-files.txt

@@ -0,0 +1,3 @@
+docker-compose.yaml
+docker-compose.prod.yaml
+.env