chore(examples): add sapper set-up

examples/sapper/src/server.js

@@ -0,0 +1,16 @@
+import sirv from "sirv";
+import polka from "polka";
+import compression from "compression";
+import * as sapper from "@sapper/server";
+
+const { PORT, NODE_ENV } = process.env;
+
+polka()
+  .use(
+    compression({ threshold: 0 }),
+    sirv("static", { dev: NODE_ENV === "development" }),
+    sapper.middleware()
+  )
+  .listen(PORT, (err) => {
+    if (err) console.log("error", err);
+  });