Update build.yaml #2

	name: Build and push container image

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build-and-push:
	runs-on: ubuntu-latest
	steps:

	# For biggish images, github actions runs out of disk space.
	# So we cleanup some unwanted things in the disk image, and reclaim that space for our docker use
	# https://github.com/actions/virtual-environments/issues/2606#issuecomment-772683150
	# and https://github.com/easimon/maximize-build-space/blob/b4d02c14493a9653fe7af06cc89ca5298071c66e/action.yml#L104
	# This gives us a total of about 52G of free space, which should be enough for now
	- name: cleanup disk space
	run: \|
	sudo rm -rf /usr/local/lib/android /usr/share/dotnet /opt/ghc
	df -h

	- name: Checkout files in repo
	uses: actions/checkout@main

	- name: Build the image and push to quay.io if not a pull request
	uses: jupyterhub/repo2docker-action@master
	with:
	# Don't push the image during a PR build
	NO_PUSH: "${{ github.event_name == 'pull_request' }}"
	# Make sure username & password/token pair matches your registry credentials
	DOCKER_USERNAME: ${{github.actor}}
	DOCKER_PASSWORD: ${{secrets.GITHUB_TOKEN}}
	DOCKER_REGISTRY: ghcr.io
	IMAGE_NAME: nmfs-opensci/test-hub-image
	REPO_DIR: /srv/repo

	# Lets us monitor disks getting full as images get bigger over time
	- name: Show how much disk space is left
	run: df -h

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