Crash loop makes crowdsec login to CAPI too many times

[blotus]

On some systems that cannot throttle crashing services, if crowdsec restarts in a loop for any reason (LAPI port already in use, bad configuration in docker, ....), crowdsec will try to login to CAPI each time it starts, which incurs heavy infra costs on our end (even though there's some rate limiting on the login).

We need to:

• Fail early (before we attempt any query to CAPI) if we cannot start the LAPI server: we should create the net.Listener as early as possible, before the call to apiserver.NewServer (this would address the specific issue of not being able to bind the port)
• Try to cache the JWT token in the database: (this would address crash loops in a more generic manner)
  • This would allow to reuse the token between starts and avoid a login call
  • Main drawback is that crowdsec won't push new scenarios to CAPI after a restart, but this can be easily worked around by scheduling a push a few minutes after the start.
  • This won't work when running in docker with no persistent volume configured (should we automatically disable CAPI when running with no volumes ? We already disable the hub update in this case)

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[github-actions[bot]]

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