Hi, I'm Alex the founder of OpenFaaS.<p>We've had a lot of interest from vendors about porting functions form AWS Lambda. Why? Their need to deploy their code on-premises and onto other clouds.<p>We provide a comprehensive guide for Python functions, plus a Node guide at the end of the article.<p>Han from the team include source code using ffmpeg to transform a full-length video into a preview thumbnail, just like the one you see on openfaas.com<p>Hope it's useful to you too.<p>Alex