Simplest setup for local server development?

I’d like to poke at the server UI, ideally without setting up my own agent. Is there documentation on the best setup for local development? I’m on a Mac, if it matters.

I tried using docker, and the public relay server:

[font=Courier]docker/local/run_local_container.sh
docker cp www/settings/locations.ini wpt:/var/www/html/settings
[/font]

My locations.ini:

[php]
[locations]
1=Public_Dulles
default=Public_Dulles

;
; These are the top-level locations that are listed in the location dropdown
; Each one points to one or more browser configurations
;

[Public_Dulles]
1=WPT_Dulles
label=“WebPageTest.org - Dulles, VA”
group=Public

;
; This is an example of a “remote” configuration where tests can be proxied to a remote
; WebPageTest instance. The test will be run by the remote server, but the results
; will be downloaded to the local server and deleted from the remote agent
;
; Each desired location from the remote server needs to be configured
; individually on the local configuration (location names do not need to match)
;
; To use the public webpagetest.org instance you will need an API key: https://www.webpagetest.org/getkey.php
;

[WPT_Dulles]
browser=Chrome,Firefox
label=“WebPageTest.org Dulles, VA - IE8”
relayServer=“https://www.webpagetest.org/
relayKey=“
relayLocation=Dulles
[/php]

This almost works–it seems like I’m able to start a run, and the UI goes through the phases of waiting for it to complete, but then when it appears to finish it gives a “Test not found” message (see screenshot)

Is there a simple fix? Or maybe just an easier way to do local development?