[fix] Add uncommitted files, and remove not used build files

resources/README.md

+These are Cordova resources. You can replace icon.png and splash.png and run
+`ionic cordova resources` to generate custom icons and splash screens for your
+app. See `ionic cordova resources --help` for details.
+
+Cordova reference documentation:
+
+- Icons: https://cordova.apache.org/docs/en/latest/config_ref/images.html
+- Splash Screens: https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-splashscreen/

resources/android/xml/network_security_config.xml

+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">localhost</domain>
+    </domain-config>
+</network-security-config>