Checkpoint current interactive fiction state

scripts/check-node-version.js

@@ -0,0 +1,11 @@
+const minimum = { major: 18, minor: 17 };
+const [major, minor] = process.versions.node.split('.').map(Number);
+
+if (major < minimum.major || (major === minimum.major && minor < minimum.minor)) {
+  console.error(
+    `Node.js ${minimum.major}.${minimum.minor}+ is required. ` +
+    `Current runtime is ${process.versions.node}.`
+  );
+  console.error('Use Node 22 LTS for this project, then rerun the command.');
+  process.exit(1);
+}