Refine Makefile & update GitLab CI image

As we merge translations directly to master, we have to merge them into dev then too.

Makefile

@@ -16,15 +16,15 @@ VENV_BIN=$(shell pwd)/$(VENV_NAME)/bin
 .PHONY: all
 all:
 	@echo "make install-js"
-	@echo "    Install dependencies"
-	@echo "make watch-js"
-	@echo "    Compile JS in watch mode."
-	@echo "make build-js"
-	@echo "    Compile JS."
-	@echo "make lint-js"
-	@echo "    Run linter"
-	@echo "make test-js"
-	@echo "    Run tests"
+	@echo "    Install npm dependencies."
+	@echo "make lint"
+	@echo "    Run linter on the project."
+	@echo "make test"
+	@echo "    Run tests on the project."
+	@echo "make test-js-watch"
+	@echo "    Run tests on the project in watch mode."
+	@echo "make test-js-update-snapshots"
+	@echo "    Update snapshots."
 	@echo "make create-messages"
 	@echo "    Create locale messages (.pot)."
 	@echo "make update-messages"