fix: remove trailing slash from url if needed

src/cli.ts

@@ -16,7 +16,7 @@ import {Logger} from '@openstapps/logger';
 import * as commander from 'commander';
 import {readFileSync} from 'fs';
 import {join} from 'path';
-import { URL } from 'url';
+import {URL} from 'url';
 import {copy} from './copy';
 import {HttpClient} from './httpClient';
 

src/client.ts

@@ -98,6 +98,9 @@ export class Client {
    * TODO: remove headers/version
    */
   constructor(protected httpClient: HttpClientInterface, protected url: string, protected version?: string) {
+    // cut trailing slash if needed
+    this.url = this.url.replace(/\/$/, '');
+
     if (typeof version === 'string') {
       // set header to tell proxy to select the correct backend
       this.headers = {