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1/ As mentionned in #96, this PR aims at reducing the number of layers of the Docker images for better performance, reduced image size and to remove potential caching quirks. To do so, the RUN calls are merged into one as recommended by Docker best practices.
For example, the released image full-3.0.2 has 28 layers. By reducing it to 4 layers, the new image is 0.9GB smaller.
2/ In addition, the image is based from
debian:11-slim
rather thandebian:11
. Any extra necessary packages to build the image will be pulled from Debian's repositories anyway.3/ Finally, the apt cache files are removed from the image. There is no need to ship an image with outdated package lists.