Can't run the container image without --privileged flag

[isneezy]

Describe the bug
When I tried to run the containerized version of the web service, it fails with the following message:

Error: Failed to launch the browser process!
Failed to move to new namespace: PID namespaces supported, Network namespace supported, but failed: errno = Operation not permitted


TROUBLESHOOTING: https://github.com/puppeteer/puppeteer/blob/main/docs/troubleshooting.md

To Reproduce
Steps to reproduce the behavior:

1. Open the terminal and type docker run -p 3000:3000 quay.io/isneezy/pdf-generator-service
2. See the error

Expected behavior
I'd expect that the container runs normally without any errors as before.

Screenshots
If applicable, could you add screenshots to help explain your problem?

Desktop (please complete the following information):

• OS: Ubuntu 20.04.5 LTS

Additional context
The container successfully starts when run with --privileged