Migration to SQL and fixes #120

	name: Alembic migrations
	on: pull_request
	jobs:
	check_files:
	name: Check files
	outputs:
	run_job: ${{ steps.check_files.outputs.run_job }}
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v2
	with:
	fetch-depth: 2
	- name: Is there a new migration?
	id: check_files
	run: \|
	echo "=============== list modified files ==============="
	git diff --name-only HEAD^ HEAD

	echo "========== check paths of modified files =========="
	git diff --name-only HEAD^ HEAD > files.txt
	run_job=true
	while IFS= read -r file
	do
	echo $file
	if [[ $file == api/database/models/* && ! $(git diff --name-only HEAD^ HEAD \| grep -q '^api/alembic/version/') ]]; then
	echo "SQL database table models have been modified and no alembic revision was found. Please create a new revision."
	run_job=false
	exit 1
	fi
	done < files.txt
	echo "::set-output name=run_job::$run_job"

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