added Caddyfile

Our favorite hits aside from nginx conf

Signed-off-by: Kenneth Obsequio <k80308392@gmail.com>

SELF_HOSTING.md

@@ -1,14 +1,13 @@
 # Self-Hosting `new_starr` (Docker Compose) — Step-by-Step
 
 This stack bundles everything: PostgreSQL, Valkey (Redis), Garage (S3), the API, and the
-frontend. Battle-tested end-to-end on a completely fresh Debian machine on 2026-08-29 —
+frontend. Battle-tested end-to-end on a completely fresh Debian machine on 2026-08-29 
 every gotcha below actually happened once and is now fixed or documented.
 
 ---
 
 ## 0. What you need
 
-- A Linux machine (Debian/Ubuntu commands below — adapt the package manager for others)
 - Docker Engine + Compose plugin
 - Node.js 22 + pnpm (only needed once, to build the frontend bundle)
 - Git access to this repo
@@ -161,7 +160,19 @@ docker compose ps
 - Frontend: **http://localhost:4650**
 - Backend: http://localhost:3024/api
 
-If both respond, you're done.
+If both respond, you're done with local testing.
+
+---
+
+## 9. (Optional) Put a real domain + HTTPS in front
+
+For actually deploying this somewhere reachable, use the `Caddyfile` at the repo root
+as a template. It's a standalone Caddy install on the host (not part of
+`docker-compose.yml`) that reverse-proxies 3 domains to the 3 ports already published
+above (`:4650`, `:3024`, `:3900`) and handles Let's Encrypt certificates automatically.
+See the comments at the top of `Caddyfile` for exact steps. Not needed for local
+`localhost:4650` testing — skip this until you're pointing a real domain at the
+machine.
 
 ---