Update mongo-storage.js (nightscout#6811)

- use default time outs
- remove MongoDB_URI (including user name and password) from public error message
- fix typos

Co-authored-by: Sulka Haro <sulka@sulka.net>

lib/storage/mongo-storage.js

@@ -24,10 +24,7 @@ function init(env, cb, forceNewConnection) {
       }
 
       console.log('Setting up new connection to MongoDB');
-      const timeout = 10 * 1000;
       const options = {
-        connectTimeoutMS: timeout,
-        socketTimeoutMS: timeout,
         useNewUrlParser: true,
         useUnifiedTopology: true,
       };
@@ -38,7 +35,7 @@ function init(env, cb, forceNewConnection) {
         try {
           await mongo.client.connect();
 
-          console.log('Successfully established a connected to MongoDB');
+          console.log('Successfully established connection to MongoDB');
 
           const dbName = mongo.client.s.options.dbName;
           mongo.db = mongo.client.db(dbName);
@@ -69,7 +66,7 @@ function init(env, cb, forceNewConnection) {
             setTimeout(connect_with_retry, timeout, i + 1);
             if (i == 1) cb(new Error('MongoDB connection failed! Double check the MONGODB_URI setting in Heroku.'), null);
           } else {
-            cb(new Error('MONGODB_URI ' + env.storageURI + ' seems invalid: ' + err.message));
+            cb(new Error('MONGODB_URI seems invalid: ' + err.message));
           }
         }
       };