Return Error if registry server is not available.

server.js

@@ -97,17 +97,22 @@ app.get('/view/:baseView', async (req, res) => {
 
 app.get('/publish', async (req, res) => {
   const data = await readJSONFile('./block.json');
+  let responseData;
 
+  try {
     const response = await fetch(`${blocksRegistry}`, {
       method: 'POST',
       body: JSON.stringify(data),
       headers: {'Content-Type': 'application/json'}
     });
 
-  const responseData = await response.json();
+    responseData = await response.json();
+  } catch (e) {
+    res.json({success: false, message: 'Blocks Registry server is not available.'});
+    return;
+  }
 
   if (responseData.statusCode !== 200) {
-    console.log(responseData);
     res.json({success: false, message: 'Error on registry level.'});
     return;
   }
@@ -123,11 +128,13 @@ app.get('/publish', async (req, res) => {
 
     if (response.status !== 200) {
       res.json({success: false, message: "Can't upload the archive, permissions error."});
+      // TODO: Need to update the registry server.
       await fs.unlink('./dist.zip');
       return;
     }
   }
 
+
   res.json({success: true});
 
   await fs.unlink('./dist.zip');