feat: turbostarter boilerplate

Production-ready Next.js boilerplate with:
- Runtime env validation (fail-fast on missing vars)
- Feature-gated config (S3, Stripe, email, OAuth)
- Docker + Coolify deployment pipeline
- PostgreSQL + pgvector, MinIO S3, Better Auth
- TypeScript strict mode (no ignoreBuildErrors)
- i18n (en/es), AI modules, billing, monitoring

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/web/src/lib/auth/server.ts

@@ -0,0 +1,63 @@
+import { headers } from "next/headers";
+import { cache } from "react";
+
+import { auth } from "@turbostarter/auth/server";
+import { logger } from "@turbostarter/shared/logger";
+
+const getHeaders = async () => {
+  const newHeaders = new Headers(await headers());
+  newHeaders.set("x-client-platform", "web-server");
+  return newHeaders;
+};
+
+export const getSession = cache(async () => {
+  const data = await auth.api.getSession({
+    headers: await getHeaders(),
+  });
+
+  return {
+    session: data?.session ?? null,
+    user: data?.user ?? null,
+  };
+});
+
+export const getOrganization = cache(
+  async ({ id, slug }: { slug?: string; id?: string }) => {
+    try {
+      return await auth.api.getFullOrganization({
+        query: {
+          organizationId: id,
+          organizationSlug: slug,
+        },
+        headers: await getHeaders(),
+      });
+    } catch (error) {
+      logger.error(error);
+      return null;
+    }
+  },
+);
+
+export const getInvitation = cache(async ({ id }: { id: string }) => {
+  try {
+    return await auth.api.getInvitation({
+      query: {
+        id,
+      },
+      headers: await getHeaders(),
+    });
+  } catch {
+    return null;
+  }
+});
+
+export const getUser = cache(async ({ id }: { id: string }) => {
+  try {
+    return await auth.api.getUser({
+      query: { id },
+      headers: await getHeaders(),
+    });
+  } catch {
+    return null;
+  }
+});