With Cachoid you have the option to load your own VCL. This option is available by:
Click on your cachoid then from the cog drop down, click on Cache
On the next page, select the root subpage (/) and click on the App button like so:
And on the next page again, set the App type to Custom VCL and save like so:
You’ll then be presented with a VCL editor screen that you can use to enter and save your VCL.