fix(frontend): .env reaches the build for $env/static, the runtime image stays without it; eslint + prettier as an alternative to biome; image named with dashes

template/{{ part_dir }}/docker-compose.yml.jinja

@@ -1,7 +1,7 @@
 services:
 {% if serve != 'api' %}  frontend:
     build: {{ part_dir }}
-    image: {{ project_slug }}/frontend
+    image: {{ project_slug | replace('_', '-') }}/frontend
     profiles: [frontend, services]
     restart: unless-stopped
     env_file: