Investigate use of ubuntu base image for docker

[JosseVanDelm]

Right now the Dockerfile uses alpine linux as a base image,
Alpine is great for reducing the size of the container image, but it makes build times a lot longer.
We should try the same configuration with the ubuntu base image and try and see if it goes quicker.
The trade-off is definitely in the size of the image, but the minimal ubuntu base image available now from docker hub is only 29 MB big, which is only 25 MB bigger than the alpine image.
https://ubuntu.com/blog/minimal-ubuntu-released