Use webpack for bundling JS libs and move Golang code related to Iframe generation there

javascript/src/viamapi-iframe.js

@@ -4,7 +4,11 @@ const pkijs = require('pkijs');
 const asn1js = require('asn1js');
 const pvutils = require('pvutils');
 const Penpal = require('penpal').default;
-window.axios = require('axios');
+const axios = require('axios');
+
+// Make these libs accessible from other scripts
+window.Penpal = Penpal;
+window.axios = axios;
 //*********************************************************************************
 
 const CERTIFIATE_Version_1 = 0;
@@ -2188,7 +2192,10 @@ const connection = Penpal.connectToParent({
         })
       });
     },
-    //{{methods}}
+    // Previously there was "//{{methods}}" placeholder, but we can't use it anymore since Uglify in webpack
+    // stripping this comment and there is no chance to preserve it
+    // (even with special words like @preserve or comment /*! */)
+    placeholderForExternalMethods:1
   }
 });