fix: pass NEXT_PUBLIC_* build args when building locally

docker-compose.yml

@@ -1,6 +1,10 @@
 services:
   michess:
-    build: .
+    build:
+      context: .
+      args:
+        NEXT_PUBLIC_API_URL: ${NEXT_PUBLIC_API_URL:-https://michess-api.mischlabs.de}
+        NEXT_PUBLIC_APP_URL: ${NEXT_PUBLIC_APP_URL:-https://michess.mischlabs.de}
     container_name: michess
     restart: unless-stopped
     environment: