New HUB Cloud Training docs page (#8174)

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/workflows/docker.yaml

@@ -6,6 +6,8 @@ name: Publish Docker Images
 on:
   push:
     branches: [main]
+    paths-ignore:
+      - "docs/**"
   workflow_dispatch:
     inputs:
       Dockerfile:
@@ -113,7 +115,7 @@ jobs:
         with:
           timeout_minutes: 60
           retry_wait_seconds: 0
-          max_attempts: 2  # retry once
+          max_attempts: 2 # retry once
           command: |
             docker build \
             --platform ${{ matrix.platforms }} \