fix prod db access

Author: jordanstephens

samples/rails/.env

@@ -1,3 +1,4 @@
 SECRET_KEY_BASE=example
-DATABASE_USERNAME=rails_user
+DATABASE_USERNAME=postgres
 DATABASE_PASSWORD=secret
+DATABASE_HOST=db

samples/rails/app/Dockerfile

@@ -44,7 +44,7 @@ FROM base
 
 # Install packages needed for deployment
 RUN apt-get update -qq && \
-    apt-get install --no-install-recommends -y curl libvips && \
+    apt-get install --no-install-recommends -y curl libvips libpq-dev && \
     rm -rf /var/lib/apt/lists /var/cache/apt/archives
 
 # Copy built artifacts: gems, application

samples/rails/app/config/database.yml

@@ -2,7 +2,7 @@ default: &default
   adapter: postgresql
   pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   username: <%= ENV["DATABASE_USERNAME"] %>
-  password: <%= ENVs["DATABASE_PASSWORD"] %>
+  password: <%= ENV["DATABASE_PASSWORD"] %>
   host: <%= ENV["DATABASE_HOST"] %>
   port: 5432
   timeout: 5000

samples/rails/compose.dev.yaml

@@ -17,9 +17,6 @@ services:
     extends:
       file: compose.yaml
       service: db
-    environment:
-      POSTGRES_USER: app_user
-      POSTGRES_PASSWORD: secret
     volumes:
       - db-data:/var/lib/postgresql/data
 volumes:

samples/rails/compose.yaml

@@ -24,13 +24,13 @@ services:
     restart: unless-stopped
     image: postgres:16
     environment:
-      POSTGRES_USER: rails_user
+      POSTGRES_USER: postgres
       POSTGRES_PASSWORD: secret
     ports:
       - mode: host
         target: 5432
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U app_user"]
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
       interval: 10s
       timeout: 5s
       retries: 5