feat(docker): use multi-stage Docker builds for smaller images #1614
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Description
Currently, the production Docker images are very large, sitting at 4.17 GB for the frontend image, and 3.49 GB for backend images. This change adds multi-stage builds, to optimize the image sizes, which results in the following improvements:
I hope this is appropriate as there is no open issue for this that I know of.
I implemented this change and tested it locally, and would be glad to discuss this and open an issue if necessary.
Checklist before requesting a review
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Screenshots (if appropriate):
Image sizes before:

Image sizes after:
