implemented

- assigning new customer numbers to contacts that don`t have one
- updating customer number counter in company table

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/urls.svelte.js

@@ -4,6 +4,10 @@ export function api(rel_path){
     return `${location.protocol}//${location.host.replace('5173','8080')}/api/${rel_path}`;
 }
 
+export function get(url){
+    return fetch(url,{ credentials:'include' });
+}
+
 export function drop(url){
     return fetch(url,{
         credentials:'include',