Add GitHub Actions workflow to keep Render Server awake with scheduled pings

Author: Harshdev625

.github/workflows/pinger.yml

@@ -0,0 +1,14 @@
+name: Keep Render Server Awake
+
+on:
+  schedule:
+    - cron: '*/5 * * * *'  # every 5 minutes
+  workflow_dispatch:      # optional: allows manual trigger
+
+jobs:
+  ping:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Ping Render Server
+        run: |
+          curl -s -o /dev/null -w "%{http_code}" https://timemachine-1.onrender.com/health