chore: set up auth instance

Author: kantord

lib/auth.ts

@@ -0,0 +1,23 @@
+import { betterAuth } from "better-auth";
+
+export const auth = betterAuth({
+  // No database configuration - running in stateless mode
+  session: {
+    expiresIn: 60 * 60 * 24 * 7, // 7 days
+    cookieCache: {
+      enabled: true,
+      maxAge: 30 * 24 * 60 * 60, // 30 days cache duration
+      strategy: "jwe", // Use encrypted tokens for better security
+      refreshCache: true, // Enable stateless refresh
+    },
+  },
+  socialProviders: {
+    // Configure your OIDC provider here
+    // Replace the env vars in .env.local with your actual OIDC provider details
+    oidc: {
+      clientId: process.env.OIDC_CLIENT_ID || "",
+      clientSecret: process.env.OIDC_CLIENT_SECRET || "",
+      issuer: process.env.OIDC_ISSUER_URL || "", // Your OIDC provider's issuer URL
+    },
+  },
+});

package.json

@@ -13,6 +13,7 @@
     "type-check": "tsc --noEmit"
   },
   "dependencies": {
+    "better-auth": "1.4.0-beta.20",
     "next": "16.0.2",
     "react": "19.2.0",
     "react-dom": "19.2.0"