Initialize google maps sdk for web platform

web/index.html

@@ -34,6 +34,7 @@
     // The value below is injected by flutter build, do not touch.
     const serviceWorkerVersion = null;
   </script>
+  <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyApU8L3yhkxmlwBer2x0HIvXW0JyGlf_Hg"></script>
   <!-- This script adds the flutter initialization JS code -->
   <script src="flutter.js" defer=""></script>
   <style id="splash-screen-style">