Ensure that letsencrypt certs are not used for the local domain

src/freedombone-utils-web

         "${PROJECT_NAME}-addcert" -h "${local_hostname}" --dhkey "${DH_KEYLENGTH}"
     fi
 
+    sed -i "s|ssl_certificate .*|ssl_certificate /etc/ssl/certs/${local_hostname}.crt;|g" "$nginx_file"
+    sed -i "s|ssl_certificate_key .*|ssl_certificate_key /etc/ssl/private/${local_hostname}.key;|g" "$nginx_file"
+
     nginx_ensite "${local_hostname}"
 
     # Compatibility with FreedomBox android app