Adding Vercel via "astro add vercel" misses output: "server" in astro.config

[jablonski]

What version of astro are you using?

1.0.3

Are you using an SSR adapter? If so, which one?

Vercel

What package manager are you using?

npm

What operating system are you using?

Linux

Describe the Bug

When I install the Vercel adapter via "astro add vercel", it adds the Vercel adapter to package.json and to the astro.config. When starting the project (e.g. via vercel dev), Astro complains:

[@astrojs/vercel] output: "server" is required to use the serverless adapter.

Link to Minimal Reproducible Example

Participation

• I am willing to submit a pull request for this issue.