Fix workdir test failing on CircleCI

See: https://support.circleci.com/hc/en-us/articles/360007324514-How-can-I-mount-volumes-to-docker-containers-

test/index.test.js

@@ -123,14 +123,18 @@ describe('starts containers properly with --build and --timeout options', () =>
 
 test('ensure container command executed with --workdir command option', async () => {
   await compose.down({ cwd: path.join(__dirname), log: logOutput, config: 'docker-compose-42.yml' });
-  await compose.run('some-service', 'cat hello.txt', {
+  const result = await compose.run('some-service', 'pwd', {
     cwd: path.join(__dirname),
     log: true,
     config: 'docker-compose-42.yml',
     composeOptions: [ '--verbose' ],
-    commandOptions: [ '--workdir', '/mountedvolume/nested/dir' ]
+
+    // Alpine has "/" as default
+    commandOptions: [ '--workdir', '/home/root' ]
   });
 
+  expect(result.out).toBe('/home/root\n');
+
   await compose.down({ cwd: path.join(__dirname), log: logOutput, config: 'docker-compose-42.yml' });
 });