Add compose stack: app + Postgres 16, named volumes

docker-compose.yml

@@ -0,0 +1,61 @@
+# LEGO Instructions Manager - Docker Compose stack
+#
+#   docker compose up -d --build
+#
+# Configuration lives in .env next to this file (copy .env.docker.example).
+# Created by: Jess Rogerson (yelling commands at Claude.AI)
+
+services:
+  db:
+    image: postgres:16-alpine
+    container_name: lim-db
+    restart: unless-stopped
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB:-lim}
+      POSTGRES_USER: ${POSTGRES_USER:-lim}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?POSTGRES_PASSWORD must be set in .env}
+      # Keeps index/sort behaviour stable across Postgres upgrades.
+      POSTGRES_INITDB_ARGS: "--encoding=UTF8 --locale=C"
+    volumes:
+      - lim-db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-lim} -d ${POSTGRES_DB:-lim}"]
+      interval: 10s
+      timeout: 5s
+      retries: 10
+      start_period: 20s
+    # Not published to the host: only the app container needs to reach it.
+    expose:
+      - "5432"
+
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: lim:latest
+    container_name: lim-app
+    restart: unless-stopped
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      FLASK_APP: run.py
+      FLASK_ENV: production
+      SECRET_KEY: ${SECRET_KEY:?SECRET_KEY must be set in .env}
+      DATABASE_URL: postgresql+psycopg://${POSTGRES_USER:-lim}:${POSTGRES_PASSWORD}@db:5432/${POSTGRES_DB:-lim}
+      UPLOAD_FOLDER: /data/uploads
+      BACKUP_FOLDER: /data/backups
+      BACKUP_KEEP: ${BACKUP_KEEP:-7}
+      MAX_CONTENT_LENGTH: ${MAX_CONTENT_LENGTH:-52428800}
+      SETS_PER_PAGE: ${SETS_PER_PAGE:-20}
+      BRICKSET_API_KEY: ${BRICKSET_API_KEY:-}
+      BRICKSET_USERNAME: ${BRICKSET_USERNAME:-}
+      BRICKSET_PASSWORD: ${BRICKSET_PASSWORD:-}
+    volumes:
+      - lim-data:/data
+    ports:
+      - "${LIM_PORT:-8000}:8000"
+
+volumes:
+  lim-db:
+  lim-data: