* chore: add self-hosted social icon assets for email templates * chore: pass current_site to project invitation email context * chore: replace mailinblue CDN icons with self-hosted static assets
* chore: add static files collection and update settings for static files support * chore: add WhiteNoise middleware for static file handling * chore(deps): upgrade WhiteNoise to version 6.11.0 and add static file reverse proxy in Caddyfile