Update Ubuntu base image and improve Dockerfile (#609)

* Update Ubuntu base image and improve Dockerfile

* Add unzip to Docker image dependencies

Needed for the arm64 build

* reset tabs

* formalized lint rules for hadolint. however the Docker formatting is being handled by MS Docker extension which doesn't indent code as expected. WIP.

* found a workaround to keep formatting

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Co-authored-by: timothycarambat <rambat1010@gmail.com>