initial devcontainer setup

.devcontainer/docker-compose.yml

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+version: '3'
+
+# NOTE on `network_mode`
+# All of the containers are bound together and share the same network context as the DB container.
+# This means that each service needs to be listening to a unique port since they are all effectively
+# mount to the same interface.  i.e. Execute can connect to postgres on 127.0.0.1:5432 even though
+# they are separate containers.  Note that if, for some reason, Postgres fails to start, the other
+# containers are going to have all manner of mysterious network connectivity issues.
+
+services:
+  app:
+    build:
+      context: ..
+      dockerfile: .devcontainer/Dockerfile
+    volumes:
+      - ..:/workspace:cached
+    depends_on:
+      - postgres
+
+    environment:
+
+      # Configure MISE to use DEV and DEVCONTAINER environments
+      MISE_ENV: dev,devcontainer 
+
+      # Setup postgres environment variables
+      PGUSER: postgres
+      PGDATABASE: app
+      PGPASSWORD: postgres
+      PGHOST: postgres
+
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    network_mode: service:postgres
+
+  caddy:
+    image: caddy:latest
+    restart: unless-stopped
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile
+      - ./offline.html:/data/offline.html
+    network_mode: service:postgres
+
+  pgweb: 
+    image: sosedoff/pgweb
+    restart: unless-stopped
+    environment:
+      - PGWEB_DATABASE_URL=postgres://postgres:postgres@127.0.0.1:5432/app?sslmode=disable
+      - PGWEB_LOCK_SESSION=true # disable connect/disconnect buttons since they aren't useful here
+    depends_on:
+      - postgres  # my database container is called postgres, not db
+    network_mode: service:postgres
+
+  postgres:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_DB: app
+      POSTGRES_PASSWORD: postgres
+    healthcheck:
+      test: pg_isready -U postgres -h 127.0.0.1
+      interval: 5s