Implement a landing page for requests to the base URL

[CasperWA]

OPTIONAL feature.

See Materials-Consortia/OPTIMADE#227.

[ml-evs]

I have a vague memory of saying that I would do this a while ago... happy to knock something together. Any issue with adding jinja2 as a dependency (so that the "splash page" can be dynamically populated with the current endpoints) or would we prefer to maintain a static extra html file?

[CasperWA]

I have a vague memory of saying that I would do this a while ago... happy to knock something together. Any issue with adding jinja2 as a dependency (so that the "splash page" can be dynamically populated with the current endpoints) or would we prefer to maintain a static extra html file?

I guess it's fine? As long as it's not a default dependency.
Just checking dependencies of FastAPI and they use it as well, but not as default. Maybe add it to server?
Just keep in mind that others may want to be able to use the index meta-database but set up their own landing page.

[ml-evs]

I have a vague memory of saying that I would do this a while ago... happy to knock something together. Any issue with adding jinja2 as a dependency (so that the "splash page" can be dynamically populated with the current endpoints) or would we prefer to maintain a static extra html file?

I guess it's fine? As long as it's not a default dependency.
Just checking dependencies of FastAPI and they use it as well, but not as default. Maybe add it to server?
Just keep in mind that others may want to be able to use the index meta-database but set up their own landing page.

Indeed, given how simple this is it might be better for us to write an html file ourselves without any extra deps