Use STORAGE_URL from the environment

flake.nix

@@ -87,6 +87,9 @@
 				} {
 					name = "PACKER_CONFIG_DIR";
 					value = "./packer_config";
+				} {
+					name = "STORAGE_URL";
+					value = "http://s3.thehellings.lan:9000";
 				} ];
 			};