Added makefile :)

Makefile

@@ -0,0 +1,23 @@
+.PHONY: help certs matrix-user switch
+
+help: ## Show this help
+	@grep -E '^[a-zA-Z_-]+:.*##' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*## "}; {printf "  \033[36m%-20s\033[0m %s\n", $$1, $$2}'
+
+switch: ## Rebuild and switch NixOS configuration
+	sudo nixos-rebuild switch --flake .#haschel
+
+certs: ## Renew certs for any hosts that don't have a cert yet
+	@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 "$$unit" & \
+		fi; \
+	done; \
+	wait; \
+	echo "Done. Check status with: systemctl list-units 'acme-order-renew-*' --all --state=failed"
+
+matrix-user: ## Register a new Matrix user interactively
+	@nix shell nixpkgs#matrix-synapse -c register_new_matrix_user \
+		-k "$$(sudo cat /var/lib/matrix-synapse/registration_shared_secret)" \
+		http://localhost:8008

configuration.nix

@@ -17,6 +17,7 @@
 
   environment.systemPackages = with pkgs; [
     git
+    gnumake
     openssl
   ];