support tunnel MVP

[rtertiaer]

What does this change intend to accomplish?

This PR brings in our support tunnel software in a pretty MVP fashion. It has an interface in the updater to permit requesting a support tunnel. It also implements two commands that are run via cronjob - one that reaps/garbage collects completed or expired tunnel sessions, and one that checks if any requested tunnels have launched in the remote side.

I'm submitting now for review, though I still need to check a couple of the checklist items off the list. I'd also like to produce a write-up describing this stack before landing it in a release, but I'd like to do that soon too.

Checklist

• Have you tested your changes and ensured they work?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• If applicable, have you updated the documentation/manual?
• If applicable, have you updated the CHANGELOG?
• Does your submission pass linting & tests? You can test on localhost using ./scripts/test
• Have you written new tests for your core features/changes, as applicable?
• If this is a UI change, have you tested it across multiple browser platforms?
• If this is a UI change, have you tested across multiple viewport sizes (ie. desktop versus mobile)?

[linknum23]

I assume I can just test this on my amplipi?

[linknum23]

Trying this out we found a couple of issues

• Needs .env file
• Add ssh-key in gcloud
• Tunnel request button could use spinner
• user needs to setup default creds in gcloud outside of init?
• fab get XXX should return json not python dict
• no wiregaurd dir
• crontab copy failure
• wireguard-tools needs install
• lower keep alive?
• password-less sudo?
• make a script that loads the venv and sources the .env?
• complete review of the README.md

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 49.49%. Comparing base (b516bb7) to head (75086f5).
Report is 53 commits behind head on main.

Files	Patch %	Lines
amplipi/updater/asgi.py	0.00%	4 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #731      +/-   ##
==========================================
- Coverage   50.90%   49.49%   -1.42%     
==========================================
  Files          25       26       +1     
  Lines        5838     6352     +514     
==========================================
+ Hits         2972     3144     +172     
- Misses       2866     3208     +342     

Flag	Coverage Δ
unittests	49.49% <0.00%> (-1.42%)	⬇️

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[linknum23]

As discussed in-person:

• mailto link should open in a new tab
• some characters are escaped wrong for the key in the mailto link

[linknum23]

Looks good. Nice work Ryan!

[rtertiaer]

This latest rendition is running on a customer's appliance in the field and works a charm. I'm gonna let it run for a day or two but I feel pretty comfortable with this rendition making it into a release.

[linknum23]

oops