Add basic Jenkinsfile

[petems]

Add Jenkinsfile for my acceptance testing

[ghost]

Your pull request doesn't follow our guidelines. Please fix the following:

• Pull request title must be in imperative, present tense (e.g. "add", "fix", "change") (?)

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Thank you! 🙏

_{This comment was made by GitMagic – Magically enforcing your contribution guidelines.}

[ghost]

Thank you, the title and description now looks good!