Created Reverse Proxying (markdown)

Reverse-Proxying.md

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+Reverse proxying should be really easy.
+* If you're proxying to a subdomain, a `proxy_pass` or equivalent is enough.
+* Proxying to a subfolder is only supported for versions > 0.2.2. Make sure to set the URL base in Settings > General (`ui > url_base` in config.ini). If you're placing it under the same subdomain as Jellyfin, make sure no CSP header is set for jfa-go's subfolder (see example below for NGINX).
+
+Below are some simple examples of reverse proxy configs.
+
+**NGINX (Subdomain)**
+```
+server {
+    listen 80;
+    server_name accounts.your.domain;
+    return 301 https://accounts.your.domain/;
+}
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name accounts.your.domain;
+
+    # put your SSL config here
+    
+    location / {
+        proxy_pass http://localhost:8056; # change as you need
+    }
+}
+```
+
+**NGINX (Subfolder on `/accounts` Jellyfin subdomain)**
+
+credit to [IngwiePhoenix](https://github.com/IngwiePhoenix).
+```
+server {
+    listen 80;
+    server_name jellyfin jellyfin.your.domain;
+    return 301 https://jellyfin.your.domain/;
+}
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name jellyfin.your.domain;
+
+    # rest of your own config
+
+    location ~ ^/accounts(.*)$ {
+        rewrite ^/accounts/(.*) /$1 break;
+        
+        # Remove the CSP header set for Jellyfin
+        proxy_hide_header Content-Security-Policy;
+        add_header Content-Security-Policy "";
+
+        proxy_pass http://localhost:8056; # Change as you need
+
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Protocol $scheme;
+        proxy_set_header X-Forwarded-Host $http_host;
+        # Disable buffering when the nginx proxy gets very resource heavy upon streaming
+        proxy_buffering off;
+    }
+}
+```