Reduce docker image size.

[demeringo]

Problem

There may be room to optimize the size of the docker image (around 650 MB at the moment)

Solution

See if we can optimize the resulting image either by:

• using a lighter base image
• double checking waht we embark in the resulting image

Alternatives

Additional context or elements

• We can use 'dive' to inspect an image https://github.com/wagoodman/dive
• We should double check that the generated image works fine / maybe add a test in CI (as we add some strange dependency issues that only manifested with specific images in the past docker image fails to start #320 )

[jonperron]

@demeringo have any of you thought about making a multi-stage build https://docs.docker.com/build/building/multi-stage/ ?

Edit: it seems that it is the case https://github.com/Boavizta/boaviztapi/blob/main/Dockerfile#L21C1-L22C40

This is often a good way to reduce the image size, as well as building a lightweight os such as alpine ? Also, I see no .dockerignore file, is it expected ?

I can take a look into it, I'm used to create light containers.

[da-ekchajzer]

I don't have much expertise on the subject, so I'll trust your expertise if you want to contribute.

[jonperron]

Adding a .dockerfile allows me to already gain 70 MB

REPOSITORY                                        TAG               IMAGE ID       CREATED          SIZE
boavizta/boaviztapi                               1.3.7             3f6ba5cfaf75   5 seconds ago    524MB
<none>                                            <none>            ef9616799172   5 hours ago      596MB

I got issue with the hardcoding of the path of the pyproject.toml at the moment

  File "/usr/local/lib/python3.12/site-packages/boaviztapi/main.py", line 35, in <module>
    version = toml.loads(open(os.path.join(os.path.dirname(__file__), 'pyproject.toml'), 'r').read())['tool']['poetry'][
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/usr/local/lib/python3.12/site-packages/boaviztapi/pyproject.toml'

but cracking the issue will allow me to gain again 64 MB

REPOSITORY                                        TAG               IMAGE ID       CREATED          SIZE
<none>                                            <none>            bab25d783b8a   2 minutes ago    460MB

I will also propose a Dockerfile based on pythonVERSION-alpine, which has a lower base image size (cf https://hub.docker.com/_/python/tags?name=3.12): 17 MB for alpine vs 44 MB for slim. I know that some people don't like alpine, so it's better to keep a debian based image.

[jonperron]

I tried to build using alpine but I don't gain as much as I expected

REPOSITORY                                        TAG               IMAGE ID       CREATED          SIZE                                                                                
boavizta/boaviztapi                               1.3.7             ffdd2633beb0   23 seconds ago   402MB
<none>                                            <none>            61285d96bddc   11 minutes ago   460MB

So I will stick with the current image used, unless you think that this is still interesting ?