feat(devops): unify frontend docker build and root env injection

docker-compose.yml

@@ -48,13 +48,12 @@ services:
       - IPAM_POOL=10.8.0.0/16
       - GIN_MODE=release
     ports:
-      - "8080:8080"
+      - "${API_PORT:-8080}:8080"
     depends_on:
       postgres:
         condition: service_healthy
       redis:
         condition: service_healthy
-    # Requires NET_ADMIN capability for nftables manipulation
     cap_add:
       - NET_ADMIN
       - NET_RAW
@@ -62,6 +61,21 @@ services:
     networks:
       - nexusnet
 
+  dashboard-ui:
+    build:
+      context: ./apps/dashboard-ui
+      dockerfile: Dockerfile
+      args:
+        # Inject the root .env variable into the frontend build process
+        VITE_API_BASE_URL: ${VITE_API_BASE_URL}
+    ports:
+      - "80:80"
+    depends_on:
+      - server-core
+    restart: unless-stopped
+    networks:
+      - nexusnet
+
 volumes:
   pgdata:
   redisdata: