Hosting a Svelte Static Site on Railway

Question

I have a static site built with SvelteKit. Currently, I deploy it on GH Pages with a workflow including a build step to generate the production assets.
However, this requires my repository to be public, and I don't want that. I recently moved my other products to Railway (launch week and metal sold me), and I'm currently trying to set up a workflow for this static site.

I've tried a bunch of stuff. This is what "works". By that, I mean the workflow completes successfully:

```yml
jobs:
  build:
    runs-on: ubuntu-latest
        steps:
      - name: Checkout
        uses: actions/checkout@v4

- name: Install Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version: 1.2.0

- name: Install dependencies
        run: bun install

- name: build project
        run: |
          bun run build

deploy:
    needs: build
    runs-on: ubuntu-latest
    container: ghcr.io/railwayapp/cli:latest
    env:
      SVC_ID: 786074b6-26f3-433c-b5ec-72aae24483f1
      ENV_ID: 48d6c7a1-1657-4d58-b083-14ccfcecc59a
      RAILWAY_TOKEN: ${{ secrets.RAILWAY_QBALL_TOKEN }}

steps:
      - uses: actions/checkout@v4
      - run: ls && railway up --service ${{ env.SVC_ID }} --environment ${{env.ENV_ID}} --detach
```

I configured the service to deploy the `build` folder, created in the build job. But of course, the `build` folder can't be found. Is there anything I can do? Or do I look for other solutions?

Project Id: ae360c46-b915-453f-bae1-b19230e7fdda