Add prometheus exporter support (develop)

[thespad]

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• I have read the contributing guideline and understand that I have made the correct modifications

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How Has This Been Tested?

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[LinuxServer-CI]

I am a bot, here is the pushed image/manifest for this PR:

ghcr.io/linuxserver/lspipepr-mastodon:develop-v4.5.0-beta.1-pkg-025a867e-dev-4230515da784ed1e3b8f2bd4ea982c72b8339a4e-pr-131

[thelamer]

Is this service now a hard requirement ?
Just asking if this service should be default sleep infinity unless enabled or if everyone needs it now.

[thespad]

Is this service now a hard requirement ? Just asking if this service should be default sleep infinity unless enabled or if everyone needs it now.

It's optional, the init hook removes it from the user bundle if the env isn't set to enable metrics; as we already have it in place for the sidekiq stuff it made sense to reuse it rather than having a sleep in the servicefile itself.

[LinuxServer-CI]

I am a bot, here is the pushed image/manifest for this PR:

ghcr.io/linuxserver/lspipepr-mastodon:develop-v4.5.0-beta.1-pkg-025a867e-dev-5450b26370cd1f6c2317ee840afa9be1113aacc4-pr-131