Implement PHP CS Fixer and a coding standard to follow (#471)

* Create PHP CS Fixer config and add to CI workflow

* Run php cs fixer on project

* Add newline at end of file

* Update to use PHP CS Fixer v3

* Run v3 config on project

* Run seperate config in CI

app/Http/Middleware/InstallationMiddleware.php

@@ -16,7 +16,7 @@ class InstallationMiddleware
      */
     public function handle($request, Closure $next)
     {
-        if (!\Storage::disk('local')->has('database_created')) {
+        if (! \Storage::disk('local')->has('database_created')) {
             return redirect('/on-boarding');
         }