Fixes #4: Resolved 502 Bad Gateway error by updating docker-compose.yml

docker-compose.yml

@@ -7,12 +7,14 @@ services:
     volumes:
       - ./movie-service/:/app/
     ports:
-      - 8001:8000
+      - "8001:8000"
     environment:
       - DATABASE_URI=postgresql://movie_db_username:movie_db_password@movie_db/movie_db_dev
       - CAST_SERVICE_HOST_URL=http://cast_service:8000/api/v1/casts/
     depends_on:
-      - movie_db
+      movie_db:
+        condition: service_healthy
+    restart: always
 
   movie_db:
     image: postgres:12.1-alpine
@@ -22,18 +24,26 @@ services:
       - POSTGRES_USER=movie_db_username
       - POSTGRES_PASSWORD=movie_db_password
       - POSTGRES_DB=movie_db_dev
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U movie_db_username"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    restart: always
 
   cast_service:
     build: ./cast-service
     command: uvicorn app.main:app --reload --host 0.0.0.0 --port 8000
     volumes:
       - ./cast-service/:/app/
     ports:
-      - 8002:8000
+      - "8002:8000"
     environment:
       - DATABASE_URI=postgresql://cast_db_username:cast_db_password@cast_db/cast_db_dev
     depends_on:
-      - cast_db
+      cast_db:
+        condition: service_healthy
+    restart: always
 
   cast_db:
     image: postgres:12.1-alpine
@@ -43,6 +53,12 @@ services:
       - POSTGRES_USER=cast_db_username
       - POSTGRES_PASSWORD=cast_db_password
       - POSTGRES_DB=cast_db_dev
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U cast_db_username"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    restart: always
 
   nginx:
     image: nginx:latest
@@ -53,7 +69,8 @@ services:
     depends_on:
       - cast_service
       - movie_service
+    restart: always
 
 volumes:
   postgres_data_movie:
-  postgres_data_cast:
+  postgres_data_cast: