Simplify docker-compose for Dokploy - API only

Caddyfile

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+{
+    email admin@donovankelly.xyz
+}
+
+# Frontend - serves the built static files
+app.todo.donovankelly.xyz {
+    root * /srv/web
+    encode gzip
+    file_server
+    
+    # SPA fallback for non-file paths
+    @spa {
+        not file
+        not path /.well-known/*
+    }
+    rewrite @spa /index.html
+    
+    header {
+        X-Content-Type-Options nosniff
+        X-Frame-Options DENY
+        Referrer-Policy strict-origin-when-cross-origin
+    }
+}
+
+# API - reverse proxy to the backend
+api.todo.donovankelly.xyz {
+    reverse_proxy host.docker.internal:3001
+    
+    header {
+        Access-Control-Allow-Origin https://app.todo.donovankelly.xyz
+        Access-Control-Allow-Methods "GET, POST, PATCH, DELETE, OPTIONS"
+        Access-Control-Allow-Headers "Content-Type, Authorization"
+        Access-Control-Allow-Credentials true
+    }
+}