style fixes, setup for backend?

server/index.ts

@@ -0,0 +1,3 @@
+export default async function main() {
+    return await Promise.resolve(12);
+}

server/services/s3.ts

@@ -0,0 +1,19 @@
+import { S3Client } from "@aws-sdk/client-s3";
+
+export default function createS3Client() {
+    if (typeof process.env.S3_ACCESS_KEY !== "string") {
+        throw new Error("S3_ACCESS_KEY is not defined");
+    }
+
+    if (typeof process.env.S3_SECRET !== "string") {
+        throw new Error("S3_SECRET is not defined");
+    }
+
+    return new S3Client({
+        region: "us-east-1",
+        credentials: {
+            accessKeyId: process.env.S3_ACCESS_KEY,
+            secretAccessKey: process.env.S3_SECRET,
+        },
+    });
+}

server/services/supabase.ts

@@ -0,0 +1,13 @@
+import { createClient } from "@supabase/supabase-js";
+
+export default function supabaseClient() {
+    if (typeof process.env.SUPABASE_URL !== "string") {
+        throw new Error("SUPABASE_URL is not defined");
+    }
+
+    if (typeof process.env.SUPABASE_KEY !== "string") {
+        throw new Error("SUPABASE_KEY is not defined");
+    }
+
+    return createClient(process.env.SUPABASE_URL, process.env.SUPABASE_KEY);
+}