fix: try to make error messages more informative #128

Job	Run time
leia-tests (ubuntu-20.04, 14, basics-example)	4m 15s
leia-tests (ubuntu-20.04, 14, badname-example)	2m 2s
leia-tests (ubuntu-20.04, 14, custom-landofile-name-example)	2m 38s
leia-tests (ubuntu-20.04, 14, events-example)	2m 47s
leia-tests (ubuntu-20.04, 14, keys-example)	4m 7s
leia-tests (ubuntu-20.04, 14, networking-example)	4m 50s
leia-tests (ubuntu-20.04, 14, proxy-example)	3m 9s
leia-tests (ubuntu-20.04, 14, scanner-example)	2m 27s
leia-tests (ubuntu-20.04, 14, services-example)	6m 51s
leia-tests (ubuntu-20.04, 14, tooling-example)	3m 17s
leia-tests (ubuntu-20.04, 14, lando-101)	5m 14s
	41m 37s

Provide feedback