fix(auth): move github oauth callbacks to app domain (#801)

packages/web/app/api/auth/[...path]/route.ts

@@ -0,0 +1,32 @@
+import { NextRequest } from "next/server";
+import { proxyUpstream } from "../../_lib/upstream-proxy";
+
+export const dynamic = "force-dynamic";
+
+async function proxy(request: NextRequest, segments: string[] = []) {
+  return proxyUpstream(request, segments, {
+    routePrefix: "/api/auth",
+    upstreamPathPrefix: "api/auth",
+    rewriteAuthLocationsToRequestOrigin: true,
+  });
+}
+
+export async function GET(request: NextRequest) {
+  return proxy(request);
+}
+
+export async function POST(request: NextRequest) {
+  return proxy(request);
+}
+
+export async function PUT(request: NextRequest) {
+  return proxy(request);
+}
+
+export async function PATCH(request: NextRequest) {
+  return proxy(request);
+}
+
+export async function DELETE(request: NextRequest) {
+  return proxy(request);
+}