Photon now supports viewing YouTube links, in app!

• feat: YouTube embeds
  • in order not to wreck your bandwidth, you must click to view (configurable)
• Feature: allow instance selection on modlog page by @0xCmdrKeen in #199
• feat: fix and re-add crosspost combining
• docker: switch to node-alpine image for faster builds

Full Changelog: https://github.com/Xyphyn/photon/compare/v1.21.0...v1.23.0