Pipelines SSH Keys only work for root users

If the Docker image you use as a build environment in Bitbucket Pipelines is not root, the SSH key can not be used in connections.

As a workaround you can manually pass in an SSH key and configure it as part of your build: https://community.atlassian.com/t5/Bitbucket-questions/How-do-I-set-up-ssh-public-key-authentication-so-that-I-can-use/qaq-p/171671