better publishing built files.

build.js

@@ -0,0 +1,47 @@
+#!/usr/bin/env node
+
+const esbuild = require('esbuild')
+const alias = require('esbuild-plugin-alias')
+
+let common = {
+  entryPoints: ['index.ts'],
+  bundle: true,
+  plugins: [
+    alias({
+      stream: require.resolve('readable-stream')
+    })
+  ],
+  sourcemap: 'external'
+}
+
+esbuild
+  .build({
+    ...common,
+    outfile: 'lib/nostr.esm.js',
+    format: 'esm',
+    packages: 'external'
+  })
+  .then(() => console.log('esm build success.'))
+
+esbuild
+  .build({
+    ...common,
+    outfile: 'lib/nostr.cjs.js',
+    format: 'cjs',
+    packages: 'external'
+  })
+  .then(() => console.log('cjs build success.'))
+
+esbuild
+  .build({
+    ...common,
+    outfile: 'lib/nostr.bundle.js',
+    format: 'iife',
+    globalName: 'NostrTools',
+    define: {
+      window: 'self',
+      global: 'self',
+      process: '{"env": {}}'
+    }
+  })
+  .then(() => console.log('standalone build success.'))