feat: update docker-compose.yml with cron and watchtower services

docker-compose.yml

@@ -16,10 +16,25 @@ services:
       - postgres
     command: ["/api"]
 
+  cron:
+    build: .
+    environment:
+      - REDIS_ADDR=redis:6379
+      - POSTGRES_DATABASE=trip_planner
+      - POSTGRES_USER=trip_planner
+      - POSTGRES_PASSWORD=trip_planner
+      - POSTGRES_HOST=postgres
+    depends_on:
+      - redis
+      - postgres
+    command: ["/cron"]
+
   redis:
     image: redis:7-alpine
     ports:
       - "6379:6379"
+    volumes:
+      - redis_data:/data
 
   postgres:
     image: postgres:15-alpine
@@ -32,5 +47,12 @@ services:
     volumes:
       - postgres_data:/var/lib/postgresql/data
 
+  watchtower:
+    image: nickfedor/watchtower:latest
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    command: --interval 60 --cleanup travel-api
+
 volumes:
   postgres_data:
+  redis_data:

docs/plans/2026-08-18-implement-deployment-infrastructure.md

@@ -60,10 +60,10 @@
 - [x] verify multi-stage structure produces minimal runtime image (27.1MB)
 
 ### Task 2: Update docker-compose.yml
-- [ ] add `cron` service (Go cron binary, depends_on: postgres, redis)
-- [ ] add `watchtower` service (nickfedor/watchtower image, volume for docker.sock, command for cleanup)
-- [ ] add `redis_data` volume to volumes section
-- [ ] verify docker-compose.yml syntax with `docker-compose config`
+- [x] add `cron` service (Go cron binary, depends_on: postgres, redis)
+- [x] add `watchtower` service (nickfedor/watchtower image, volume for docker.sock, command for cleanup)
+- [x] add `redis_data` volume to volumes section
+- [x] verify docker-compose.yml syntax with `docker-compose config`
 
 ### Task 3: Create Gitea Actions CI/CD Workflow
 - [ ] create `.gitea/workflows/deploy.yml` file