Increase Nginx maximum post size

Current Nginx config file will result in a 413 error ("Payload Too Large") if uploading file larger than 2MB. This change increases this to 100MB to avoid this issue.

Author: FoamToaster

pages/reverse-proxies/nginx.mdx

@@ -145,6 +145,9 @@ Copy your config from here:
         # Disable directory listing for security
         autoindex off;
 
+        # Increase maximum post size to prevent 413 error with images larger than 2MB (changes max size to 100MB)
+        client_max_body_size 100M;
+
         # Enable Gzip compression for better performance
         gzip on;
         gzip_comp_level 6;
@@ -222,4 +225,4 @@ sudo systemctl reload nginx
 ```
 ### Vuola!
 Your Nginx reverse proxy is now running, securely serving your Postiz instance at your subdomain.domain.tld. 🎉
-</Steps>
+</Steps>