[Makefile] lint and format

Makefile

@@ -1,11 +1,11 @@
-.PHONY: build events dev stop help prep
+.PHONY: build events dev stop help prep lint format
 
 help:
 	@echo "Available commands:"
 	@echo "  make prep    - Create venv and install requirements"
 	@echo "  make events  - Update site from CSV (build pages + images)"
-	@echo "  make dev     - Start development server"
-	@echo "  make stop    - Stop development server"
+	@echo "  make dev     - Start development server (might need sudo)"
+	@echo "  make stop    - Stop development server (might need sudo)"
 	@echo "  make build   - Full website build sequence"
 	@echo "  make help    - Show this help message"
 
@@ -28,3 +28,9 @@ dev:
 
 stop:
 	nginx -p . -s stop
+
+lint:
+	./.venv/bin/flake8 . --config .flake8 --exclude .venv
+
+format:
+	./.venv/bin/black .