Fix health check 404: add /api/health route, remove nginx /health proxy

Frontend API_BASE is /api in production, so health check was hitting
/api/health which didn't exist. Added /api/health on the server and
removed the now-unnecessary separate nginx /health proxy rule.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/server/src/index.ts

@@ -26,6 +26,7 @@ app.use('*', cors({
 }));
 
 app.get('/health', (c) => c.json({ status: 'ok', version: '0.1.0' }));
+app.get('/api/health', (c) => c.json({ status: 'ok', version: '0.1.0' }));
 
 app.get('/api/config', (c) => c.json({
   requireInvite: process.env.REQUIRE_INVITE !== 'false',

apps/web/nginx.conf

@@ -10,10 +10,6 @@ server {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
 
-    location /health {
-        proxy_pass http://server:3001;
-    }
-
     location / {
         try_files $uri $uri/ /index.html;
     }