perf(woodpecker): add Docker layer caching for faster builds

.woodpecker.yml

@@ -11,22 +11,27 @@ steps:
         #!/bin/bash
         set -e
 
-        # Get changed files from last commit
         CHANGED_FILES=$(git diff --name-only HEAD~1 HEAD || echo "")
 
-        # Check if relevant files changed (src, package.json, Dockerfile, etc.)
+        # Skip if only docs changed
+        if echo "$CHANGED_FILES" | grep -qE "^\.github/|^\.woodpecker|\.md$"; then
+          if ! echo "$CHANGED_FILES" | grep -qE "^(src/|package\.json|Dockerfile|vite\.config)"; then
+            echo "⏭️ Only docs changed, skipping"
+            exit 78
+          fi
+        fi
+
         RELEVANT_CHANGED=false
         if echo "$CHANGED_FILES" | grep -qE "^(src/|package\.json|package-lock\.json|Dockerfile|vite\.config|tsconfig|public/)"; then
           RELEVANT_CHANGED=true
-          echo "✅ Admin panel code changed - will build"
+          echo "✅ Admin panel code changed"
         fi
 
-        # Exit with code 78 to skip subsequent steps if no changes
         if [ "$RELEVANT_CHANGED" = "true" ]; then
-          echo "🚀 Will build admin panel"
+          echo "🚀 Building admin panel"
           exit 0
         else
-          echo "⏭️ Skipping admin panel - no relevant changes"
+          echo "⏭️ Skipping admin panel"
           exit 78
         fi
 
@@ -45,3 +50,6 @@ steps:
       password:
         from_secret: GHCR_TOKEN
       platforms: linux/amd64
+      # Enable layer caching
+      cache_from: ghcr.io/traceworks2023/nxtgauge-admin-solid:cache
+      cache_to: ghcr.io/traceworks2023/nxtgauge-admin-solid:cache