diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index b811715..a9372fa 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -7,6 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
+    - name: Dump GitHub context
+      env:
+        GITHUB_CONTEXT: ${{ toJson(github) }}
+      run: echo "$GITHUB_CONTEXT"
     - name: Docker build
       if: github.event_name != 'delete' && github.event_name != 'create'
       run: docker build -t peaceiris/actions-hugo .