For now this just connects to MongoDb. No authentication or anything like that. In a future update I'll let people specify better granularity, but for now this works pretty well.
| 1 | getDbConnection(collection, dataUri)
 | 
| collection | the collection to update. You should never worry about this as there are 2 collections used by this app, "evaluations" and "models". If you mess with that then you are going to break things. | 
| dataUri | the URI of the mongoDb to use. Note just the URL is needed for now. | 
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