Using the Forever Node Module on multiple projects - node.js

Question

I am in the process of setting up two different web application projects on my server. I am attempting to get Node, MongoDB, and the Forever Node module set up correctly so that I can use Forever on my scripts to keep them running 24/7.
The main issue I am running into is the local vs. global installations for Node and the two modules. I have attempted this installation process five times now using a few resources online as well as a bash script that I found here (https://github.com/punkave/stagecoach/blob/master/sc-proxy/install-node-and-mongo-on-ubuntu.bash).
Nothing I do seems to work correctly. Either the Forever command doesn't work from my application's folder or when Forever does work, the process gets stopped immediately with a log file created. Here is the contents of the log file:
module.js:340
throw err;
^
Error: Cannot find module 'mongodb'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (/var/www/html/test/requestHandlers.js:6:13)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
error: Forever detected script exited with code: 8
So obviously I am not installing Node, MongoDB, and Forever correctly. What is the best way to go about this process?
I am running on an Ubuntu 14.04 instance hosted on an Amazon AWS EC2 server.
Here is my require() for mongodb:
var mongo = require('mongodb'),
Server = mongo.Server,
Db = mongo.Db,
host = "localhost";
Latest error log that Forever creates:
/var/www/html/test/node_modules/mongodb/lib/mongodb/db.js:403
if(connection && connection.serverCapabilities.hasListCollectionsCommand) {
^
TypeError: Cannot read property 'hasListCollectionsCommand' of undefined
at Db.listCollections (/var/www/html/test/node_modules/mongodb/lib/mongodb/db.js:403:49)
at Db.createCollection (/var/www/html/test/node_modules/mongodb/lib/mongodb/db.js:1026:8)
at Object.<anonymous> (/var/www/html/test/requestHandlers.js:15:4)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (/var/www/html/test/indextest.js:3:23)
error: Forever detected script exited with code: 8