concatenate Dockerfile commands - reduces final images size

[CybotTM]

Hi,

this patch reduces final image size from 99 MiB to 57 MiB

[nijel]

Merged thanks. Can you please point me to some docs, why this makes the difference?

[CybotTM]

The reason is the layered file system and how docker builds/processes the Dockerfile.
I'm not sure if their is documentation that describes this effect exactly - but if you understand the layered FS and how docker builds the images you will come to this conclusion by yourself.
It's just a current best practice.

• http://woudenberg.io/reducing-docker-image-size/
• https://labs.ctl.io/optimizing-docker-images/

[nijel]

Thanks for the links!

[lem9]

@CybotTM Hi Sebastian, happy to see you again!