Reapply "trusted proxies"

This reverts commit 72be30c25f.

fireflyiii/rootfs/etc/nginx/servers/ssl.conf

@@ -0,0 +1,26 @@
+server {
+    listen 8443;
+
+    include /etc/nginx/includes/server_params.conf;
+    include /etc/nginx/includes/proxy_params.conf;
+
+    ssl_certificate /ssl/%%certfile%%;
+    ssl_certificate_key /ssl/%%keyfile%%;
+
+    client_max_body_size 0;
+
+	root /var/www/firefly-iii/public/;
+
+	index index.html;
+
+    location / {
+        root /var/www/firefly-iii/public/;
+    }
+
+   location ~* \.php(?:$|/) {
+      include snippets/fastcgi-php.conf;
+      fastcgi_param SCRIPT_FILENAME $request_filename;
+      fastcgi_param modHeadersAvailable true; #Avoid sending the security headers twice
+      fastcgi_pass unix:/run/php/php8.0-fpm.sock;
+   }
+}