adds boilerplate for cli

src/bin/index.js

@@ -0,0 +1,24 @@
+#!/usr/bin/env node
+
+const args = process.argv.slice(2);
+
+const scriptIndex = args.findIndex(
+  x => x === 'build' || x === 'test',
+);
+
+const script = scriptIndex === -1 ? args[0] : args[scriptIndex];
+
+switch (script) {
+  case 'build': {
+    console.log('building');
+    break;
+  }
+
+  case 'test': {
+    console.log('testing');
+    break;
+  }
+  default:
+    console.log(`Unknown script "${script}".`);
+    break;
+}