How to export a project from IBM Bluemix PaaS to anywhere else as a Docker?

I lead a web/mobile project and I still need to know the tools we will be using for development. We have a 6 months access to IBM Bluemix, and its security check tools, CloudFoundry, and others may appear really useful.

However, we don't want to rely on a solution that would trap our project without any possibility of migration if needed.

I looked up on the internet how to export a project from Bluemix as a docker, with elements created from IBM. I didn't find anything relevant (I might be bad at googling, but all I can find is "how to export to Bluemix/how to work locally").

Does Bluemix allow to export the entire project onto another hoster, does it depend on the services we used in the project ?

Thank you in advance.