Create RP docs for Plex.

docs/applications/plex.mdx

@@ -114,3 +114,121 @@ If you need to link your Plex instance to another application, such as Sonarr or
 Host: 127.0.0.1
 Port: <your plex port>
 ```
+## Plex Nginx Configuration (optional)
+
+### Subdomain
+
+This method serves Plex on it's own domain. This can be a subdomain you've registered through [LetsEncrypt](https://swizzin.ltd/applications/letsencrypt), answering "no" to applying the config to the swizzin default.
+After this, you can use the nginx configuration below with some minor modifications in order to get Plex up and serving on your own (sub)domain. 
+The following can either be appended to ``/etc/nginx/sites-enabled/default`` or can (better method) be put into it's own file at ``/etc/nginx/sites-enabled/plex.conf``. 
+Prior to installing this configuration, navagate to [app.plex.tv](https://app.plex.tv) and use the settings listed in the box below. 
+After making changes, ``sudo nginx -t`` to test your config, then ``sudo nginx -s reload`` to apply it. 
+You can also apply ``allowLocalhostOnly="1"`` to your Plex ``Preferences.xml`` file to force it to stop serving on the port.
+
+<details><summary>Subdomain Configuration (Nginx)</summary>
+```plaintext main
+set ``Remote Access - Disable``, 
+Network -> Custom server access URLs = https://<your-domain>:443,http://<your-domain>:80
+Network -> Secure connections = Preferred.
+```
+
+```nginx 
+upstream plex_backend {
+    server 127.0.0.1:32400;
+    keepalive 32;
+}
+
+map $http_upgrade $connection_upgrade {
+    default upgrade;
+    ''      close;
+}
+
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    # Define Server Domain
+    server_name plex.yourdomain.com;
+
+    ssl_certificate /etc/nginx/ssl/plex.yourdomain.com/fullchain.pem;
+    ssl_certificate_key /etc/nginx/ssl/plex.yourdomain.com/key.pem;
+
+    include snippets/ssl-params.conf;
+    #
+    send_timeout 100m;
+    #
+    location / {
+        # Sockets
+        proxy_set_header Sec-WebSocket-Extensions $http_sec_websocket_extensions;
+        proxy_set_header Sec-WebSocket-Key $http_sec_websocket_key;
+        proxy_set_header Sec-WebSocket-Version $http_sec_websocket_version;
+        # Plex Headers
+        proxy_set_header X-Plex-Client-Identifier $http_x_plex_client_identifier;
+        proxy_set_header X-Plex-Device $http_x_plex_device;
+        proxy_set_header X-Plex-Device-Name $http_x_plex_device_name;
+        proxy_set_header X-Plex-Platform $http_x_plex_platform;
+        proxy_set_header X-Plex-Platform-Version $http_x_plex_platform_version;
+        proxy_set_header X-Plex-Product $http_x_plex_product;
+        proxy_set_header X-Plex-Token $http_x_plex_token;
+        proxy_set_header X-Plex-Version $http_x_plex_version;
+        proxy_set_header X-Plex-Nocache $http_x_plex_nocache;
+        proxy_set_header X-Plex-Provides $http_x_plex_provides;
+        proxy_set_header X-Plex-Device-Vendor $http_x_plex_device_vendor;
+        proxy_set_header X-Plex-Model $http_x_plex_model;
+        # Allows All Encodings
+        proxy_set_header Accept-Encoding "";
+        proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_ssl_verify off;
+        proxy_http_version 1.1;
+        proxy_set_header Host $http_host;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+        proxy_read_timeout 86400;
+        proxy_pass https://plex_backend;
+      }
+}
+```
+</details>
+
+### App Location
+
+One option of getting Plex to serve on your domain correctly is to ``nano /etc/nginx/apps/plex.conf`` and paste the following. 
+This is far from an ideal solution, but is one surefire way of getting the mediaserver to serve on the correct port and location. 
+For this method, please apply the following settings to plex. After making changes, ``sudo nginx -t`` to test your config, then ``sudo nginx -s reload`` to apply it.
+
+<details>
+  <summary>Location Configuration (Nginx)</summary>
+
+```plaintext main
+set ``Remote Access - Disable``, 
+Network - Custom server access URLs = https://<your-domain>:443/web,http://<your-domain>:80/web
+Network - Secure connections = Preferred.
+```
+
+```nginx
+location /web {
+    #Example of using sub_filter to alter what Plex displays, this disables Plex News.
+    #sub_filter ',news,' ',';
+    # Pass Plex
+    proxy_pass http://127.0.0.1:32400/web;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    #When using ngx_http_realip_module change $proxy_add_x_forwarded_for to '$http_x_forwarded_for,$realip_remote_addr'
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    # Allow HTTP Upgrades
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+    proxy_redirect off;
+    proxy_buffering off;
+}
+```
+</details>
+
+
+## Tunnelling Plex to VPS
+
+[See this Gist](https://gist.github.com/MarMed/94b5537a9fb61cf7212808692bbef14d)
+
+
+