(Feature request) Support /metrics endpoint

[perfectra1n]

Describe feature

I think it would be cool to support a /metrics endpoint to gather data about a Trilium instance. We could still put it behind authN, this endpoint is common for tools like Prometheus that scrape information from various services to then display in Grafana. If we think this is a trash idea, I'll put it back in the 🗑.

Additional Information

No response

[meichthys]

Related to #81

[eliandoran]

@perfectra1n , what kind of information would you be interested in?

[perfectra1n]

(This was inspired by this issue for a Trilium homepage widget)

• Something like a basic health check (does SELECT 1 against the SQLite DB succeed, does /login return a 200)
• num. of notes
• num. of revisions
• Trilium version
• Sync version
• DB version
• DB size?

I believe are the first things that come to mind...

[perfectra1n]

Yeah I think it's slightly related to that issue @meichthys but I think the majority of those requests were for some form of "in app" visibility / metrics, while this would be "outside" of the app in a sense...

[perfectra1n]

As a really silly example of something similar, here's my Nextcloud dashboard

[pano9000]

• Trilium version

• Sync version

• DB version

if this is already required: that type of information can be checked via /api/app-info already.

I do like the additional idea of metrics though like the ones you mentioned above, so +1 from my side