check for new releases on github, and log a warn if update is possible

[metachris]

📝 Summary

This is a proposal and request for comments and input.

• check for new mev-boost releases on Github regularly, and log (info) if update is possible
• can be disabled with setting env var DISABLE_NEW_RELEASE_CHECK=1
• default check time: at startup and every 2 hours
• timeout can be configured with NEW_RELEASE_CHECK_INTERVAL_H

Question: should this be opt-in or opt-out?

⛱ Motivation and Context

mev-boost users should get notified if new releases are available

---

✅ I have run these commands

• [x] make lint
• [x] make test-race
• [x] go mod tidy

[codecov-commenter]

Codecov Report

Merging #329 (75a0bce) into main (97207c6) will decrease coverage by 1.14%. The diff coverage is 58.82%.

@@            Coverage Diff             @@
##             main     #329      +/-   ##
==========================================
- Coverage   82.14%   81.00%   -1.15%     
==========================================
  Files           5        5              
  Lines         661      695      +34     
==========================================
+ Hits          543      563      +20     
- Misses         90       99       +9     
- Partials       28       33       +5     

Flag	Coverage Δ
unittests	81.00% <58.82%> (-1.15%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
server/service.go	80.04% <58.33%> (-0.67%)	:arrow_down:
server/utils.go	69.23% <59.09%> (-3.24%)	:arrow_down:

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[avalonche]

I think opt-in is a good idea, it would notify validators to update mev-boost that may be hard to reach or not monitoring communication channels.

[jtraglia]

I like the idea but I'm not sure how useful it would be in practice. The type of person that this caters to probably isn't the type of person that regularly checks their mev-boost logs, only when something isn't working properly.

[metachris]

closing this for now. may be worth reconsidering with an opt-in flag