Add Reverse proxy example with caddy

Setup-Reverse-Proxy.md

@@ -17,7 +17,7 @@ In the admin configuration, check the box marked `Allow Reverse Proxy Authentica
 6. [Traefik 2.0](https://github.com/janeczku/calibre-web/wiki/Setup-Reverse-Proxy#traefik-200)
 7. [Traefik >= 2.4.1 with Authelia forward auth](https://github.com/janeczku/calibre-web/wiki/Setup-Reverse-Proxy/#traefik--241-with-authelia-forward-auth)
 8. [Traefik 2.6.0 Example with Kobo Sync Fix Enabled](https://github.com/janeczku/calibre-web/wiki/Setup-Reverse-Proxy#traefik-260-example-kobo-sync-fix-enabled)
-
+9. [Caddy](https://github.com/janeczku/calibre-web/wiki/Setup-Reverse-Proxy#Caddy)
 
 
 
@@ -291,3 +291,14 @@ An example Authelia Rule of Kobo Sync bypass is here:
       resources:
       - "^/kobo([/?].*)?$"
 ```
+
+### Caddy
+
+A working caddy configuration for https, using the domain calibre.mydomain.com:
+```
+calibre.mydomain.com {
+        reverse_proxy localhost:8083 {
+             header_up X-Scheme https
+        }
+}
+```