feat: add share url alias /s

frontend/src/pages/s/[shareId].ts

@@ -0,0 +1,18 @@
+import { GetServerSidePropsContext } from "next";
+
+// Redirect to the share page
+export function getServerSideProps(context: GetServerSidePropsContext) {
+  const { shareId } = context.params!;
+
+  return {
+    props: {},
+    redirect: {
+      permanent: false,
+      destination: "/share/" + shareId,
+    },
+  };
+}
+
+export default function ShareAlias() {
+  return null;
+}