Add the CORS file

Author: Brayden

src/cors.ts

@@ -0,0 +1,16 @@
+export const corsHeaders = {
+    'Access-Control-Allow-Origin': '*',
+    'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
+    'Access-Control-Allow-Headers': 'Authorization, Content-Type, X-Starbase-Source',
+    'Access-Control-Max-Age': '86400',
+};
+
+export function corsPreflight(request: Request) {
+    // Handle OPTIONS preflight request first
+    if (request.method === 'OPTIONS') {
+        return new Response(null, {
+            status: 204,
+            headers: corsHeaders
+        });
+    }
+}