docs: docs website + installation (#778)

* feat: WIP doc (vibe started and iterated)

* install from scratch docs

* caddyfile.example

* gitignore

* authentik script

* authentik script

* authentik script

* llm doc

* authentik ongoing

* more daily setup logs

* doc website

* gpu self hosted setup guide (no-mistakes)

* doc review round

* doc review round

* doc review round

* update doc site sidebars

* feat(docs): add mermaid diagram support

* docs polishing

* live pipeline doc

* move pipeline dev docs to dev docs location

* doc pr review iteration

* dockerfile healthcheck

* docs/pr-comments

* remove jwt comment

* llm suggestion

* pr comments

* pr comments

* document auto migrations

* cleanup docs

---------

Co-authored-by: Mathieu Virbel <mat@meltingrocks.com>
Co-authored-by: Igor Loskutov <igor.loskutoff@gmail.com>

.gitignore

@@ -1,6 +1,7 @@
 .DS_Store
 server/.env
 .env
+Caddyfile
 server/exportdanswer
 .vercel
 .env*.local
@@ -18,4 +19,5 @@ CLAUDE.local.md
 www/.env.development
 www/.env.production
 .playwright-mcp
+docs/pnpm-lock.yaml
 .secrets