update build

build.json

@@ -4,7 +4,7 @@
       "name": "frontend",
       "dir": ".",
       "artifacts": [
-        "build/"
+        "frontend.tar.gz"
       ]
     }
   ]

package.json

@@ -30,7 +30,7 @@
   },
   "scripts": {
     "start": "PORT=8080 react-scripts start",
-    "build": "react-scripts build",
+    "build": "react-scripts build && cd build && tar czf ../frontend.tar.gz .",
     "test": "react-scripts test",
     "eject": "react-scripts eject"
   },