Add preview gh action

[asmacdo]

On PR, build a tmp site so we can see changes without building locally.

[yarikoptic]

well, if we used RTD -- we could do eat easily. But ATM website is served from in-house web server, and build is a bit ad-hoc since not compatible with recent pelican. Do you know how it (previewzs) could be done without much struggle?

[yarikoptic]

what about at least a CI run which would smoke test the build that it builds ok?

[yarikoptic]

Wanna to take on @asmacdo ?

[asmacdo]

@yarikoptic sure-- I can't self-assign, can you add me to the repo?

[yarikoptic]

oh, I added you to the repo with super powers now, and assigning now. Thanks!

[yarikoptic]

may be we could use netlify here for open source hosting?

[asmacdo]

Checking with netlify: https://answers.netlify.com/t/open-source-self-hosted-site-needs-pr-previews/96668

[asmacdo]

Response from netlify:

Hey @asmacdo,

This should still qualify. Please fill this up: oss-account-application (netlify.com) and feel free to link to this thread.

Its also worth considering using the same deploy system for preview/production. Perhaps we could deploy to a subdomain using our existing host?

Or, we could proceed with netlify for preview hosting, and if it goes well we could easily switch prod to them as well (free!)

[yarikoptic]

FWIW: https://github.com/marketplace/actions/deploy-pr-preview could be used if we decide to move to gh-pages

[yarikoptic]

if you think to go with netlify - please fill out that that form @asmacdo