diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index fe5f459..49628e5 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -25,6 +25,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          submodules: recursive
 
       - name: Setup Hugo
         run: |
@@ -63,7 +65,16 @@ jobs:
           hugo version
 
       - name: Hugo Build
-        run: hugo --minify
+        run: |
+          set -euo pipefail
+          rm -rf public
+          hugo --minify
+          test -s public/index.html
+          if grep -q "Welcome to nginx" public/index.html; then
+            echo "public/index.html is nginx default page, aborting" >&2
+            exit 1
+          fi
+          grep -q "洛尘的技术笔记" public/index.html
 
       - name: Build and Push Docker Image
         env:
diff --git a/Dockerfile b/Dockerfile
index 8dc55d4..be727c3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,6 @@
 FROM docker.m.daocloud.io/library/nginx:alpine
-COPY public/ /usr/share/nginx/html
+RUN rm -rf /usr/share/nginx/html/*
+COPY public/ /usr/share/nginx/html/
+RUN test -s /usr/share/nginx/html/index.html \
+    && ! grep -q "Welcome to nginx" /usr/share/nginx/html/index.html
 EXPOSE 80