Add a binary to allow use without copying example

packages/libs/lambda-at-edge/package.json

@@ -7,6 +7,9 @@
   "description": "Provides handlers that can be used in CloudFront Lambda@Edge to deploy next.js applications to the edge",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
+  "bin": {
+    "build-lambda-at-edge": "src/command.js"
+  },
   "scripts": {
     "prepare": "yarn build",
     "build": "rollup --config && tsc -p tsconfig.build.json"

packages/libs/lambda-at-edge/src/command.ts

@@ -0,0 +1,26 @@
+import { default as Builder } from "./build";
+import { join } from "path";
+
+async function main(args: string[]) {
+  if (args.length > 1) {
+    console.error("Usage: build-lambda-at-edge [ NEXT_APP_DIR ]");
+    process.exit(1);
+  }
+
+  const nextConfigDir = args[0] || ".";
+  const outputDir = join(nextConfigDir, ".serverless_nextjs");
+
+  const builder = new Builder(nextConfigDir, outputDir, {
+    cmd: "./node_modules/.bin/next",
+    cwd: process.cwd(),
+    env: {},
+    args: ["build"]
+  });
+
+  await builder.build();
+}
+
+main(process.argv.slice(2)).catch((err) => {
+  console.error(err);
+  process.exit(1);
+});