close chidl processes when parent exits

packages/api/src/controllers/serverConnections.js

@@ -14,6 +14,8 @@ module.exports = {
   handle_error(conid, { error }) {
     console.log(`Error in server connection ${conid}: ${error}`);
   },
+  handle_ping() {
+  },
 
   async ensureOpened(conid) {
     const existing = this.opened.find(x => x.conid == conid);