Emit allow headers for each request

src/server.ts

@@ -14,16 +14,16 @@ const generateId = () => nanoid(32);
 
 const clients: Record<string, http.ServerResponse> = {};
 
+const CORS = {
+  'Access-Control-Allow-Methods': '*',
+  'Access-Control-Allow-Headers': '*',
+  'Access-Control-Allow-Origin': process.env.ALLOW_ORIGIN || '*',
+};
+
 const server = http.createServer((req, res) => {
   if (req.method === 'OPTIONS') {
-    res.writeHead(200, {
-      'Acess-Control-Allow-Methods': '*',
-      'Acess-Control-Allow-Headers': '*',
-      'Access-Control-Allow-Origin': process.env.ALLOW_ORIGIN || '*',
-    });
-    
+    res.writeHead(200, CORS);
     res.end();
-
     return;
   }
   switch (req.url) {
@@ -41,7 +41,7 @@ const server = http.createServer((req, res) => {
         'Content-Type': 'text/event-stream',
         Connection: 'keep-alive',
         'Cache-Control': 'no-cache',
-        'Access-Control-Allow-Origin': process.env.ALLOW_ORIGIN || '*',
+        ...CORS,
       });
       sender.send(buffer).then(() => {
         res.write('event: connected\n');