improved linguist language detection

Author: Tobias Wellnitz, DH1TW

.gitattributes

@@ -1 +1,5 @@
-html/* linguist-vendored
+webserver/html/* linguist-vendored
+webserver/html/index.html linguist-vendored=false
+webserver/html/static/js/components/* linguist-vendored=false
+webserver/html/static/js/components/app.js linguist-vendored=false
+