Clean up legacy files, ignore list, files, etc. (#24)

* chore(all): remove unused files

* chore(ignore): ignore js builds

* chore(js bundles): remove js builds and add env setup scripts

* fix(build/template): fix incorrect prod template and add ignores

* fix(browser): refine selected status style and small fixes

* chore(readme): update readme status

.gitignore

@@ -1,10 +1,14 @@
+# frontend
 **/*.bundle.js
 **/*.js.map
 **/coverage
 **/files
 **/node_modules/*
-**/dist
-**/vendor
 **/yarn-error
-**/public/static/*/*.js
-**/public/static/**/*.js
+**/public/static/**/*.js
+**/public/index.html
+
+# backend
+**/*/quickshare.db
+**/*/files/
+**/*/uploadings/