Add pg_tde_version() function to get the module version of the extension #203

	name: Build and Test Docker Image

	on: [pull_request, workflow_dispatch]

	jobs:
	build-and-test:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v2

	- name: Build Docker image
	run: \|
	docker build -t perconalab/pg_tde:${{ github.sha }} -t pg_tde-test . -f docker/Dockerfile

	- name: Run and test Docker image
	run: \|
	docker run --name pg-tde -e POSTGRES_PASSWORD=mysecretpassword -d pg_tde-test
	sleep 10
	IP=$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' pg-tde)
	echo $IP
	echo "CREATE TABLE test_enc(id SERIAL, k INTEGER DEFAULT '0' NOT NULL, PRIMARY KEY (id)) USING pg_tde;" \| docker run -e PGPASSWORD=mysecretpassword --rm postgres psql -h $IP -U postgres
	echo "SELECT * FROM test_enc;" \| docker run -e PGPASSWORD=mysecretpassword --rm postgres psql -h $IP -U postgres

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