Added backend and refactored frond-end to support it.

* Removed unecesery home page
* Added PHP Api that provides auth and replaces the json-server for data storage
* Added support for alternate geocode-api
* Added registration  page

.eslintrc.cjs

@@ -16,6 +16,7 @@ module.exports = {
       'warn',
       { allowConstantExport: true },
     ],
-    "no-unused-vars": ["off"]
+    "no-unused-vars": ["off"],
+    'react/prop-types': 'off'
   },
 }