[#1468] Add configuration step for OpenKlant2 connectivity #8358

Job	Run time
Build and check documentation	1m 33s
End-to-end tests, chromium	4m 8s
Check that documentation for configuration steps is up-to-date	0s
End-to-end tests, firefox	4m 17s
Run the Django test suite (main)	19m 51s
End-to-end tests, webkit	4m 29s
Run the Django test suite (elastic)	5m 28s
End-to-end tests, msedge	5m 42s
Run the Django test suite (openklant)	3m 53s
Build (and push) Docker image	1m 50s
Upload coverage information to codecov	17s
	51m 28s

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