fix: Allow upload of bigger files

2mb (the default) isn't enough for file submission, especially via the API when the content is base64 encoded.

etc/nginx/sites-available/lookyloo

@@ -1,6 +1,7 @@
 server {
     listen 80;
     server_name server_domain_or_IP;
+    client_max_body_size 16M;
 
     location / {
         proxy_pass_header Server;