Update lunr-server and team-api

[mbland]

This PR breaks down to:

• Some more minor ./go script tweaks
• Getting lunr-server to use the /config volume convention, and updating all other daemon containers to reference the /config directory. Mounting config volumes as /usr/local/18f/team-api/config instead of just /usr/local/18f/team-api proved necessary to avoid mounting a writable volume (/usr/local/18f/team-api/team-api.18f.gov) on top of a read-only volume (/usr/local/18f/team-api).
• Creating an SSH config volume that copies data to $HOME/.ssh and runs ssh-agent and ssh-add. This is necessary for the team-api, hub, and pages daemons to access private repositories.
  • I created a key for the 18f-bot account, and added the account as a collaborator to 18F/team-api.18f.gov and 18F/hub. Not sure if it's worth making the bot a read-only 18F org member, or if we need to tell everyone posting to pages-staging and pages-private that they need to add the 18f-bot as a read-only collaborator.
  • This hasn't been an issue before because the existing key associated with the Hub/Team API/Pages services is associated with my GitHub account.
• Ended up using an ENTRYPOINT with team-api. I'll go back and update all the other daemons to use this format in a future PR.

cc: @jcscottiii @ccostino @afeld

[mbland]

Whoops, forgot to cc: @catherinedevlin earlier.

[jcscottiii]

@mbland i just had one comment. everything else looks good!

[mbland]

@jcscottiii The Travis build finally passed!

[mbland]

cc: @batemapf