diff --git a/assets/build.js b/assets/build.js
new file mode 100644
index 0000000..fc884e9
--- /dev/null
+++ b/assets/build.js
@@ -0,0 +1,50 @@
+const esbuild = require('esbuild')
+
+const args = process.argv.slice(2)
+const watch = args.includes('--watch')
+const deploy = args.includes('--deploy')
+
+const loader = {
+  // Add loaders for images/fonts/etc, e.g. { '.svg': 'file' }
+}
+
+const plugins = [
+  // Add and configure plugins here
+]
+
+let opts = {
+  entryPoints: ['js/app.js'],
+  bundle: true,
+  target: 'es2017',
+  outdir: '../priv/static/assets',
+  logLevel: 'info',
+  loader,
+  plugins
+}
+
+if (watch) {
+  opts = {
+    ...opts,
+    watch,
+    sourcemap: 'inline'
+  }
+}
+
+if (deploy) {
+  opts = {
+    ...opts,
+    minify: true
+  }
+}
+
+const promise = esbuild.build(opts)
+
+if (watch) {
+  promise.then(_result => {
+    process.stdin.on('close', () => {
+      process.exit(0)
+    })
+
+    process.stdin.resume()
+  })
+}
\ No newline at end of file