add esbuild

bin/t2006.js

@@ -1,4 +1,4 @@
 #!/usr/bin/env node
 
 // eslint-disable-next-line node/no-unpublished-import
-import "../src/index.js";
+import "../dist/index.js";

esbuild.js

@@ -0,0 +1,37 @@
+import { build } from "esbuild";
+import fs from "node:fs";
+import path from "node:path";
+
+const getNodeModules = () => {
+  const nodeModulesPath = path.resolve(import.meta.dirname, "node_modules");
+  if (!fs.existsSync(nodeModulesPath)) {
+    return [];
+  }
+
+  return fs.readdirSync(nodeModulesPath).filter((module) => {
+    return !module.startsWith(".");
+  });
+};
+
+const ESBUILD_NAME = "NPM Bundle";
+const OUT_FILE = "dist/index.js";
+
+const nodeModules = getNodeModules();
+
+const buildOptions = {
+  bundle: true,
+  entryPoints: ["src/index.js"],
+  external: nodeModules,
+  format: "esm",
+  outfile: OUT_FILE,
+  platform: "node",
+};
+
+build(buildOptions)
+  .then(() => {
+    console.log(`${ESBUILD_NAME} has been built to ${OUT_FILE}`);
+  })
+  .catch((e) => {
+    console.error(`Error building ${ESBUILD_NAME}: ${e.message}`);
+    process.exit(1);
+  });