Nixpacks Bug Report: jsonc is parsed as json

[mpcref]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Nixpacks parses deno.jsonc as json instead of jsonc.

To reproduce

deno.jsonc:

{
	"tasks": {
		// This comment is valid in jsonc.
		"start": "dist/start"
	}
}

% nixpacks build .
Error: Error reading deno.jsonc as JSON

Caused by:
    key must be a string at line 3 column 3

Expected behavior

deno.jsonc should be parsed as jsonc.

Environment

nixpacks 1.28.1 on macOS 14.6.1 (23G93).