fix: update backend volume paths in docker-compose for caching consistency (#399)

Author: clostao

docker-compose.prod.yml

@@ -72,7 +72,7 @@ services:
     ports:
       - "${BACKEND_WORKER_PORT}:3000"
     volumes:
-      - files_cache:/usr/src/app/.cache
+      - files_cache:/usr/src/app/backend/.cache
     restart: unless-stopped
     env_file:
       - .env
@@ -93,7 +93,7 @@ services:
   backend-api:
     image: ${BACKEND_IMAGE}
     volumes:
-      - files_cache:/usr/src/app/.cache
+      - files_cache:/usr/src/app/backend/.cache
     ports:
       - "${BACKEND_API_PORT}:3000"
     restart: unless-stopped
@@ -121,7 +121,7 @@ services:
   backend-download-worker:
     image: ${BACKEND_IMAGE}
     volumes:
-      - files_cache:/usr/src/app/.cache
+      - files_cache:/usr/src/app/backend/.cache
     restart: unless-stopped
     ports:
       - "${BACKEND_DOWNLOAD_WORKER_PORT}:3000"
@@ -144,7 +144,7 @@ services:
   backend-download-api:
     image: ${BACKEND_IMAGE}
     volumes:
-      - files_cache:/usr/src/app/.cache
+      - files_cache:/usr/src/app/backend/.cache
     ports:
       - "${BACKEND_DOWNLOAD_API_PORT}:3000"
     restart: unless-stopped