Test

build: update dockerfiles to fix hadolint issues. #114

Job	Run time
test_course_definition / go_lint	2s
test_course_definition / docker_lint	13s
test_course_definition / identify_language_slugs	4s
test_course_definition / js_lint	25s
test_course_definition / markdown_lint	58s
test_course_definition / rust_lint	5s
test_course_definition / validate-schemas	22s
test_course_definition / validate-stages-naming	5s
test_course_definition / verify_templates_compiled	24s
test_course_definition / test (c)	54s
test_course_definition / test (go)	35s
test_course_definition / test (nim)	35s
test_course_definition / test (php)	35s
test_course_definition / test (python)	22s
test_course_definition / test (ruby)	32s
test_course_definition / test (rust)	1m 31s
test_course_definition / test (swift)	55s
	8m 37s

Provide feedback