Homebrew removed mongodb support

[arjohnston]

As per licensing changes from MongoDB, it's no longer supported on homebrew, check out the associated PR 43770

Testing alternative solutions to install mongodb. This looks promising, however I had to re-install the database:
Set up a custom tap
brew tap mongodb/brew

Remove the existing MongoDB program
brew uninstall mongodb

Remove the DB files (they appear to be outdated)
sudo rm -rf /data/db/

Install the community edition
brew install mongodb-community

Create the empty DB
sudo mkdir -p /data/db

Set the permissions
sudo chown -R 'id -un' /data/db

Run Mongo to test
mongod

Steps found at MongoDB

Note that this does not re-initialize the database with the files from the setup steps outlined in README.MD; this setup process should be verified with the re-initialized DB files

[arjohnston]

This is going to be addressed in my PR coming tonight / tomorrow