allow users to set port for cypress runs (apache#16533)

Makefile

@@ -66,7 +66,7 @@ venv:
 	test -d venv || ${PYTHON} -m venv venv # setup a python3 virtualenv
 	. venv/bin/activate
 
-make activate:
+activate:
 	source venv/bin/activate
 
 pre-commit:
@@ -90,3 +90,11 @@ flask-app:
 
 node-app:
 	cd superset-frontend; npm run dev-server
+
+build-cypress:
+	cd superset-frontend; npm run build-instrumented
+	cd superset-frontend/cypress-base; npm install
+
+open-cypress:
+	if ! [ $(port) ]; then cd superset-frontend/cypress-base; CYPRESS_BASE_URL=http://localhost:9000 npm run cypress open; fi
+	cd superset-frontend/cypress-base; CYPRESS_BASE_URL=http://localhost:$(port) npm run cypress open