build: add test-all and coverage targets

Makefile

@@ -62,6 +62,12 @@ build: ui
 dev:
 	$(GOCMD) build -o $(EXECUTEABLE) -tags=dev ./cmd/tank
 
+test-all:
+	gitlab-runner exec docker test-all
+
+coverage:
+	gitlab-runner exec docker test-all | grep 'ok.*of statements'
+
 clean:
 	rm -f $(EXECUTEABLE)