fix: build shared production images once

docker/docker-compose.prod.yml

@@ -8,9 +8,6 @@ x-logging: &default-logging
 
 x-php-service: &php-service
   image: sport-era-prod-php:local
-  build:
-    context: ..
-    dockerfile: docker/Dockerfile.php
   restart: unless-stopped
   network_mode: host
   working_dir: /likeadmin_php/server
@@ -25,9 +22,6 @@ x-php-service: &php-service
 
 x-crawler-service: &crawler-service
   image: sport-era-prod-crawler:local
-  build:
-    context: ${CRAWLER_DIR:-./crawler}
-    dockerfile: Dockerfile
   restart: unless-stopped
   network_mode: host
   env_file:
@@ -47,6 +41,9 @@ x-crawler-service: &crawler-service
 services:
   server:
     <<: *php-service
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile.php
     healthcheck:
       test:
         - CMD-SHELL
@@ -60,9 +57,6 @@ services:
 
   scheduler:
     <<: *php-service
-    # Reuse the server PHP image; building the same tag concurrently causes
-    # BuildKit export collisions during a full production bootstrap.
-    build: null
     command:
       - sh
       - -c
@@ -70,11 +64,12 @@ services:
 
   crawler:
     <<: *crawler-service
+    build:
+      context: ${CRAWLER_DIR:-./crawler}
+      dockerfile: Dockerfile
 
   kb-worker:
     <<: *crawler-service
-    # Reuse the crawler image built by the crawler service.
-    build: null
     command:
       - python
       - scripts/kb_worker.py