Add SWAG configuration

Using-a-Reverse-Proxy-with-Paperless-ngx.md

@@ -1,4 +1,4 @@
-[Nginx](#nginx) | [Apache](#apache) | [Caddy](#caddy) | [Traefik](#traefik)
+[Nginx](#nginx) | [Apache](#apache) | [Caddy](#caddy) | [Traefik](#traefik) | [SWAG](#SWAG)
 
 If you want to expose paperless to the internet, you should hide it
 behind a reverse proxy with SSL enabled. The officially supported method is Nginx.
@@ -231,3 +231,37 @@ Below is an example Traefik configuration you would add to the webserver contain
       - "traefik.http.routers.paperless.tls.certresolver=letsencrypt"
       - "traefik.http.services.paperless.loadbalancer.server.port=8000"
 ```
+
+# SWAG
+
+Below is an example of one way to configure SWAG for paperless-ngx
+
+Add the Auto-Proxy dockermod to the SWAG container.
+This mod needs the universal-docker mod installed and set up with either mapping docker.sock or setting the environment variable DOCKER_HOST=remoteaddress.
+
+To add the dockermod with read only mapping to docker.sock, add the folling to the compose for the SWAG container:
+
+```
+environment:
+- DOCKER_MODS=linuxserver/mods:universal-docker|linuxserver/mods:swag-auto-proxy
+
+volumes:
+- '/var/run/docker.sock:/var/run/docker.sock:ro'
+```
+Full documentation for Auto-Proxy here:
+https://github.com/linuxserver/docker-mods/tree/swag-auto-proxy
+
+
+Below is an example SWAG configuration you would add to the webserver container.
+
+Change the swag_url to match your own.
+
+```
+labels:
+- swag=enable
+- swag_url=paperless.mydomain.com
+- swag_server_custom_directive=proxy_redirect off;
+- swag_server_custom_directive=proxy_set_header Host $host:$server_port;
+- swag_server_custom_directive=proxy_set_header X-Forwarded-Host $server_name;
+- swag_server_custom_directive=add_header Referrer-Policy "strict-origin-when-cross-origin";
+```