fix(ci): clear Docker builder cache before builds

Fixes stale cache issue on self-hosted runners causing lockfile mismatch.

Author: HMarzban

.github/workflows/prod.docs.plus.yml

@@ -237,19 +237,24 @@ jobs:
           echo "DEPLOY_TAG=${{ env.DEPLOY_TAG }}" >> "${{ env.ENV_FILE }}"
           echo "✅ Environment ready"
 
+      - name: 🧹 Clear Stale Docker Cache
+        run: |
+          echo "🧹 Clearing Docker builder cache..."
+          docker builder prune -f 2>/dev/null || true
+          echo "✅ Cache cleared"
+
       - name: 🏗️ Build Docker Images
         env:
           DOCKER_BUILDKIT: 1
           COMPOSE_DOCKER_CLI_BUILD: 1
         run: |
           echo "🔨 Building images with tag: ${{ env.DEPLOY_TAG }}"
-          echo "🚀 BuildKit enabled for faster cached builds"
 
           set -a
           source ${{ env.ENV_FILE }}
           set +a
 
-          # Build with BuildKit and parallel execution
+          # Build with parallel execution
           docker compose -f ${{ env.COMPOSE_FILE }} \
             --env-file ${{ env.ENV_FILE }} \
             build --parallel

.github/workflows/stage.docs.plus.yml

@@ -209,13 +209,17 @@ jobs:
           echo "DEPLOY_TAG=${{ env.DEPLOY_TAG }}" >> "${{ env.ENV_FILE }}"
           echo "✅ Environment prepared"
 
+      - name: 🧹 Clear Stale Docker Cache
+        run: |
+          echo "🧹 Clearing Docker builder cache..."
+          docker builder prune -f 2>/dev/null || true
+          echo "✅ Cache cleared"
+
       - name: 🏗️ Build Docker Images
         env:
           DOCKER_BUILDKIT: 1
           COMPOSE_DOCKER_CLI_BUILD: 1
         run: |
-          echo "🚀 BuildKit enabled for faster cached builds"
-
           set -a
           source ${{ env.ENV_FILE }}
           set +a