Fail on warnings #23

Job	Run time
docker (grafana, observability/grafana, observability/grafana/Dockerfile, cogstacksystems/cogstac...	31s
docker (traefik, observability/traefik, observability/traefik/Dockerfile, cogstacksystems/cogstac...	23s
docker (blackbox, observability/prometheus, observability/prometheus/Dockerfile.blackbox, cogstac...	26s
docker (prometheus, observability/prometheus, observability/prometheus/Dockerfile.prometheus, cog...	28s
	1m 48s

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