Sample some projects for Docker image 5.0rc1

[humitos]

We just released 4.0 and 5.0rc1.

So,

• 2.0 got deprecated
• 3.0 became stable
• 4.0 became latest

Now, we want to start testing 5.0rc1 with some projects. This image have some changes.

We want to create a Feature flag that "no matter has the user selected for the docker image we want to use 5.0rc for container_image" when building the docs.

Once we have this feature added, we can start with 100, 500, 1500 and 5000 projects for a month and half and after that, release the new image.

[stsewd]

Current implementation of the config module allow us to override user's image frmo the db field container_image

[humitos]

Yes, but we don't want to do that avoid future miss-understandings. We just released these images and we didn't know why there were projects with 4.0rc1, it it was because we wanted to test the image or because they needed something specific from that image. Now, we want to avoid that confusion by creating a Feature flag.

This flag, will be useful to test all the rc releases, not just this one in particular.