This is a drop-in setup for Gnus. I have it setup for both my personal and work account, but it should be easy enough to tweak docker-compose.yml for only one account.

Create a ~/.mailman.env file for your credentials

IMAP_USER=youremail@gmailc.om
IMAP_PASSWORD=sosecret

Run docker-compose up -d in this directory.

As of now, you also need these hard coded credentials in your ~/.authinfo

machine localhost login mailman password frozenfish port 8143
machine localhost login mailman password frozenfish port 8144

Add something like this to your gnus config.

 (add-to-list 'gnus-secondary-select-methods
	'(nnimap "personal"
	     (nnimap-stream network)
	     (nnimap-address "localhost")
	     (nnimap-server-port 8143)
	     (nnimap-authenticator login)))

 (add-to-list 'gnus-secondary-select-methods
	'(nnimap "work"
	     (nnimap-stream network)
	     (nnimap-address "localhost")
	     (nnimap-server-port 8144)
	     (nnimap-authenticator login)))