How to expose code-marketplace to code-server

[sharkymark]

This example Coder v2 template (see main.tf) shows how to set environment variables that code-server expects to designate the EXTENSIONS_GALLERY including serviceUrl, itemUrl and resourceUrlTemplate1 before [starting](https://github.com/sharkymark/v2-templates/blob/main/pod-air-gap-y/main.tf#LL239C14-L239C80) code-server`

You can ignore the other security feature enabled, which is disabling file downloads.

Your code-marketplace must also be accessible to code-server I use the Caddy reverse proxy to route traffic from a DNS entry to the IP of the VM running code-marketplace