Update makefile

Makefile

@@ -1,18 +1,4 @@
-.PHONY: help certs switch
+.PHONY: lock
 
-help:
-	@grep -E '^[a-zA-Z_-]+:.*##' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*## "}; {printf "  \033[36m%-20s\033[0m %s\n", $$1, $$2}'
-
-switch:
-	sudo nixos-rebuild switch --flake .#haschel
-
-certs:
-	@for unit in $$(systemctl list-units 'acme-order-renew-*' --all --plain --no-legend --state=inactive --state=failed | awk '{print $$1}'); do \
-		domain=$$(echo "$$unit" | sed 's/acme-order-renew-//;s/\.service//'); \
-		if [ ! -f "/var/lib/acme/$$domain/fullchain.pem" ]; then \
-			echo "Requesting cert for $$domain..."; \
-			sudo systemctl start "$$unit" & \
-		fi; \
-	done; \
-	wait; \
-	echo "Done. Check status with: systemctl list-units 'acme-order-renew-*' --all --state=failed"
+lock:
+	nix flake lock