adds migrator service to docker compose

Author: lmcdonough

docker-compose.yaml

@@ -1,28 +1,40 @@
+version: "3.9"
+
 services:
   postgres:
-    image: postgres:17
+    image: postgres:17  # PostgreSQL image
     container_name: postgres
     environment:
-      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_USER: ${POSTGRES_USER}  # From .env
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
       POSTGRES_DB: ${POSTGRES_DB}
     ports:
       - "${POSTGRES_PORT}:5432"
     volumes:
-      - postgres_data:/var/lib/postgresql/data
-      - ./migration/src/setup.sql:/docker-entrypoint-initdb.d/0-setup.sql
-      - ./migration/src/refactor_platform_rs.sql:/docker-entrypoint-initdb.d/1-refactor_platform_rs.sql
-      - ./migration/src/setup_default_user.sql:/docker-entrypoint-initdb.d/2-setup_default_user.sql
+      - postgres_data:/var/lib/postgresql/data  # Persist data
     networks:
       - backend_network
-    healthcheck:
+    healthcheck:  # Wait for DB to become ready
       test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
       interval: 5s
       timeout: 5s
       retries: 5
 
+  migrator:
+    image: ${BACKEND_IMAGE_NAME}  # Reuse your backend image
+    container_name: db-migrator
+    depends_on:
+      postgres:
+        condition: service_healthy  # Wait for DB before running
+    environment:
+      DATABASE_URL: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:${POSTGRES_PORT}/${POSTGRES_DB}
+    restart: "no"  # Run once, do not restart
+    networks:
+      - backend_network
+    # No command override — will default to running `migration up` once
+
   rust-app:
-    image: ${BACKEND_IMAGE_NAME}
+    image: ${BACKEND_IMAGE_NAME}  # Rust backend app
     platform: ${PLATFORM}
     container_name: ${BACKEND_CONTAINER_NAME}
     environment:
@@ -43,13 +55,13 @@ services:
     ports:
       - "${BACKEND_PORT}:${BACKEND_PORT}"
     depends_on:
-      postgres:
-        condition: service_healthy
+      migrator:
+        condition: service_completed_successfully  # App only runs if migrator succeeds
     networks:
       - backend_network
 
   nextjs-app:
-    image: ${FRONTEND_IMAGE_NAME}
+    image: ${FRONTEND_IMAGE_NAME}  # Next.js frontend
     container_name: ${FRONTEND_CONTAINER_NAME}
     environment:
       NEXT_PUBLIC_BACKEND_SERVICE_PROTOCOL: ${BACKEND_SERVICE_PROTOCOL}
@@ -60,10 +72,12 @@ services:
       - "${FRONTEND_SERVICE_PORT}:${FRONTEND_SERVICE_PORT}"
     depends_on:
       - rust-app
+    networks:
+      - backend_network
+
+volumes:
+  postgres_data:
 
 networks:
   backend_network:
     driver: bridge
-
-volumes:
-  postgres_data: