Clarify "allowCommands" setup

[eric-burel]

Is your feature request related to a problem?

I am hitting an error jsh: permission denied: astro when switching from the Vite default template to an Astro app.
After some digging, this seems to be a security system that prevents the terminal to run random commands in the webcontainer. And it seems that the allowCommands configuration field should help with that, but I fail to figure it out based on the current documentation.

Describe the solution you'd like.

• We may be able to define some default allowed commands at template level, or at tutorial level
• The allowCommands setting should be made explicit in the Vite demo so we quickly figure how to tweak it for a new technology (if it's the right setting which I am not sure of yet)
• The permission denied error could be made more explicit
• Tiny improvements : highlight and ctrl+c doesn't seem to work in the terminal, also I observe a freeze just before the webcontainer starts installing package, not sure of the cause yet
• I am pretty sure I didn't observe the same behaviour on my other computer, the Next app was running with no setting from me. I don't have a reliable reproduction yet, perhaps you updated the project since.

Describe alternatives you've considered.

I've tried setting up my lesson frontmatter like so, no luck:

---
type: lesson
title: Welcome to AstroPatterns
terminal:
  panels: "output"
  allowCommands: ["astro"]

Additional context

I think the error is related to allowCommands but perhaps the "jsh" error stems from another issue I don't know about.

[AriPerkkio]

If this was coming from allowComands you should see error jsh: the 'astro' command is disabled and cannot be used..

Could you check if you are running into similar issue as #187 by checking that src/templates/** has no node_modules?

[eric-burel]

Awesome, closing in favour of #187
It does have a node_modules indeed, I create new templates by running commands which usually install node_modules too

[AriPerkkio]

This is now fixed in 0.1.2 versions. Now node_modules of templates are not copied to lesson code. It's safe to have node_module present on file system for testing purposes.