build: basic esbuild setup

purescript/factorio-throughput/build.js

@@ -0,0 +1,22 @@
+const esbuild = require("esbuild");
+const PurescriptPlugin = require("esbuild-plugin-purescript");
+const path = require("path");
+
+const isProd = process.env.NODE_ENV === "production";
+
+esbuild
+  .build({
+    entryPoints: ["src/index.js"],
+    bundle: true,
+    outdir: "dist",
+    watch: !isProd,
+    plugins: [
+      PurescriptPlugin({
+        output: isProd ? path.resolve(__dirname, "dce-output") : undefined,
+      }),
+    ],
+    define: {
+      global: "window",
+    },
+  })
+  .catch((_e) => process.exit(1));