add GitHub action on pushing to run lint (#224)

* Add script to run eslint for the project

* Add GitHub Action for linting

Prevent merges with linting errors

* Rename GitHub Action "build_push" to "build_push_master"

package.json

@@ -32,7 +32,8 @@
     "build-md5": "find build -type f | sort | xargs md5sum | awk '{ print $1 }' | tr -d '\n' | md5sum| awk '{ print $1 }' > buildZip/md5sum ",
     "build-zip": "cd build && rev=$(git rev-list HEAD --count) && echo r$rev > revision && zip -9 -r ../buildZip/Tachidesk-WebUI-r$rev *",
     "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "eject": "react-scripts eject",
+    "lint": "eslint src --ext .ts,.tsx,.js,.jsx"
   },
   "browserslist": {
     "production": [