bug: unable to import from `/src` project subdir when using import map

hi,
i created a test repository with this file structure (each `mod.js` is empty file, `import_map` is filled to make absolute imports work, the `main.js` file just imports mods absolutely):
> /deno.json
> /import_map.json
> /main.js
> /lib/mod_1.js
> /src/mod_2.js
> /src/src/mod_3.js
```json
"imports": {
"/": "./",
"./": "./"
}
```
```js
// main.js
import mod_3 from '/src/src/mod_3.js';
import mod_2 from '/src/mod_2.js';
import mod_1 from '/lib/mod_1.js';
```

and when trying to deploy via Git Integration (or deployctl), an error occurs:
> Cloning repository (100%)
> Downloaded file:///src/main.js
> Downloaded file:///src/mod_2.js
> Downloaded file:///src/src/mod_3.js
> Downloaded file:///src/lib/mod_1.js
> Error The deployment failed: Module not found "file:///src/mod_2.js".

the file structure in the deploy is the same as in the repo, but only 1 and 3 mods are imported fine
on localhost all mods are imported without errors

Reproduce the deployment with deno.json, import_map.json, main.js, and the listed lib/ and src/ files using deployctl or Git Integration, then compare it with the successful localhost import. The issue is resolved when /src/mod_2.js and the other absolute imports deploy and load consistently with the repository structure.

Written by the indexing model from the issue text.