adding tor switch and update readme

README.md

@@ -78,3 +78,25 @@ now visit http://localhost:1337 in your browser, you can develop without needing
 ## NGINX
 
 uncomment in .env # COMPOSE_PROFILES=f0ckm-nginx to enable nginx proxy with automatic lets encrypt.
+
+## Tor Hidden Service (.onion)
+
+Tor is bundled in `docker-compose.yml` and preconfigured with a hidden service pointing to the application (`f0ckm:1337`).
+
+When running `docker compose up -d`, Tor automatically generates a `.onion` address for your node. You can find your onion address by running:
+
+```bash
+cat ./f0ckm-data/tor/f0ckm_hs/hostname
+```
+
+### Automatic Onion-Location Header
+To advertise your `.onion` address to Tor Browser users visiting your clearnet site, add your `.onion` address to `config.json`:
+
+```json
+"main": {
+  "onion": "http://yourgeneratedaddress.onion"
+}
+```
+
+When set, Tor Browser users visiting the HTTPS clearweb site will see a purple **".onion available"** pill in the address bar.
+