Add deployment documentation

[kristjanvalur]

Some suggestions from someone setting up on linux.

Readme talks about development. But deployment (e.g. in a docker container) is something else.
Currently I think I have to to:

• install python3 and pip3, gdb, elfutils, e.g. apt install -y python3 python3-pip gdb elfutils
• pip3 install poetry
• clone repo or unzip source
• cd into root and run poetry update && poetry install

to run the program we need to poetry run upload_coredump from the root folder.

Additionally, this tool might be mentioned in the sentry platform documentation, also the fact that linux core files are not natively supported.

Cheers!