Bump dockerfile, make build context smaller

List of related issues or pull requests

Refs: N/A

Describe the changes made in this pull request

Updated Dockerfile:

now uses a more recent FROM image, now using python 3.10.6 and alpine 3.16
updates pip before installing the package
smaller Docker context using .dockerignore (< 0.5MB, was >120MB)
some minor doc changes

Instructions to review the pull request

(have a working docker installation)

# make a temp directory, cd into it
cd $(mktemp -d --tmpdir howfairis.XXXXXX)

# get a copy of the repo
git clone https://github.com/fair-software/howfairis .

# checkout the branch
git checkout bump-dockerfile

# build howfairis docker image
docker build -t fairsoftware/howfairis:latest .

# run an example on github and on gitlab
docker run -ti --rm fairsoftware/howfairis:latest https://github.com/fair-software/howfairis-livetest
docker run -ti --rm fairsoftware/howfairis:latest https://gitlab.com/jspaaks/howfairis-livetest

# look inside the docker container if everything looks OK
docker run -ti --rm --entrypoint /bin/sh fairsoftware/howfairis:latest 
apk add tree 
tree -a

fair-software / howfairis

Bump dockerfile, make build context smaller #345