Open graph image generation cannot load static image from path

[vojtechmares]

Link to the code that reproduces this issue

https://codesandbox.io/p/devbox/white-forest-zd8n9h

To Reproduce

1. deploy the app to Vercel using the Vercel CLI (vercel build ... && vercel deploy --prebuilt ...)
2. try opening the opengraph image
3. See error 500 and in logs error that the /var/task/public/images/people/vojtech-mares.png image was not found

Current vs. Expected behavior

Current: OG image endpoint returns error 500 after it fails to locate the image in the built version. I've checked the output source and the image file exists.

Expected: an image is returned for the OG including the static image of myself in the generated OG picture

The issue is only present in Vercel deployment, everything works locally just fine.

Provide environment information

/bin/sh: yarn: command not found

Operating System:
  Platform: darwin
  Arch: arm64
  Version: Darwin Kernel Version 24.3.0: Thu Jan  2 20:24:16 PST 2025; root:xnu-11215.81.4~3/RELEASE_ARM64_T6000
  Available memory (MB): 32768
  Available CPU cores: 10
Binaries:
  Node: 22.14.0
  npm: 10.9.2
  Yarn: N/A
  pnpm: 9.12.2
Relevant Packages:
  next: 15.2.4 // Latest available version is detected (15.2.4).
  eslint-config-next: 15.2.4
  react: 19.0.0
  react-dom: 19.0.0
  typescript: 5.8.2
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

Not sure

Which stage(s) are affected? (Select all that apply)

Vercel (Deployed)

Additional context

I tested the latest version.

I do not have a Git repository connected since the source is on my private GitLab instance and I am using GitLab CI to deploy the application with Vercel CLI.

The deployment job looks like this:

# ...
deploy:production:
  stage: deploy
  script:
    - vercel pull --yes --environment=production --token=${VERCEL_TOKEN}
    - vercel build --prod --token=${VERCEL_TOKEN}
    - vercel deploy --prod --prebuilt --token=${VERCEL_TOKEN}
  environment:
    name: production
    url: https://www.mares.cz
  rules:
    - if: $CI_COMMIT_BRANCH == 'main'