HTML/JS frontend calls simple node server that does nothing but call a stored procedure like

   spc_handle_request(req_headers, req_body, http_method, ...)

stored procedure does simple routing and does something like

  insert into table (a, b, c) values (to_json(req_body).a, to_json(req_body).b, to_json(req_body).c);

or

  to_json(select * from emp);

Time to implement simple crud app: 10 minutes.