Optimize app build

Makefile

@@ -9,7 +9,6 @@ run:
 build:
 	- @rm -rf build
 	@npm run build
-	@rm build/static/js/*.map
 
 docker-build:
 	- @docker image rm $(IMAGE_NAME)

package.json

@@ -19,7 +19,7 @@
     },
     "scripts": {
         "start": "react-scripts start",
-        "build": "react-scripts build",
+        "build": "GENERATE_SOURCEMAP=false react-scripts build",
         "test": "react-scripts test",
         "eject": "react-scripts eject"
     },

public/robots.txt

@@ -1,3 +1,3 @@
 # https://www.robotstxt.org/robotstxt.html
 User-agent: *
-Disallow:
+Disallow: *