serving built app on port 3000 when starting with fastify

this eases up scalingo deployment

website/server.mjs

@@ -0,0 +1,17 @@
+import { join } from "path"
+import Fastify from "fastify"
+import staticMiddleware from "@fastify/static"
+const fastify = Fastify({
+  logger: true,
+})
+
+fastify.register(staticMiddleware, {
+  root: join(import.meta.dirname, process.env.STATIC_DIR || "dist"),
+})
+
+try {
+  fastify.listen({ port: process.env.PORT || 3000 })
+} catch (err) {
+  fastify.log.error(err)
+  process.exit(1)
+}