Add env.js file to support static hosting of MB

Author: farhan-momin

env.js

@@ -0,0 +1,3 @@
+// File for static Musicblocks hosting e.g. https://sugarlabs.github.io/musicblocks/
+window.MB_ENV = "production";
+window.MB_IS_DEV = false;

index.html

@@ -108,7 +108,7 @@
     </script>
     <script src="lib/astring.min.js" defer></script>
     <script src="lib/acorn.min.js" defer></script>
-    <script src="/env.js"></script>
+    <script src="env.js"></script>
 
 
     <script data-main="js/loader" src="lib/require.js" defer></script>

planet/index.html

@@ -24,7 +24,7 @@
     <script type="text/javascript" src="libs/jquery-3.7.1.min.js"></script>
     <script type="text/javascript" src="libs/materialize.min.js"></script>
     <script type="text/javascript" src="libs/localforage.min.js"></script>
-    <script type="text/javascript" src="/env.js"></script>
+    <script type="text/javascript" src="../env.js"></script>
 
     <script type="text/javascript" src="js/helper.js"></script>
     <script type="text/javascript" src="js/StringHelper.js"></script>