Do not edit /etc/nginx/nginx.conf file directly.

debian/jitsi-meet.postinst

             sed -i "s/jitsi-meet.example.com/$JVB_HOSTNAME/g" /etc/nginx/sites-available/$JVB_HOSTNAME.conf
         fi
 
-        if grep "# server_names_hash_bucket_size 64" /etc/nginx/nginx.conf > /dev/null; then
-            sed -i "s/#\ server_names_hash_bucket_size\ 64/\ server_names_hash_bucket_size\ 64/" /etc/nginx/nginx.conf
-        fi
-
         # SSL for nginx
         db_get jitsi-meet/cert-choice
         CERT_CHOICE="$RET"

doc/debian/jitsi-meet/jitsi-meet.example

+server_names_hash_bucket_size 64;
+
 server {
     listen 80;
     server_name jitsi-meet.example.com;