first rewrite commit

src/lib/config.ts

@@ -0,0 +1,15 @@
+import crypto from "node:crypto";
+
+function requireEnv(name: string, fallback?: string): string {
+  const value = process.env[name] ?? fallback;
+  if (!value) {
+    throw new Error(`Missing required environment variable ${name}`);
+  }
+  return value;
+}
+
+export const config = {
+  sessionSecret: requireEnv("SESSION_SECRET", process.env.NODE_ENV === "development" ? crypto.randomBytes(32).toString("hex") : undefined),
+  caddyApiUrl: process.env.CADDY_API_URL ?? "http://caddy:2019",
+  baseUrl: process.env.BASE_URL ?? "http://localhost:3000"
+};