add submodules option to docker workflow

Signed-off-by: ngn <ngn@ngn.tf>

.gitea/workflows/docker.yml

@@ -3,12 +3,12 @@ name: docker
 on:
   push:
     branches:
-      - "main"
+      - 'main'
     paths-ignore:
-      - "README.md"
-      - "LICENSE.txt"
-      - "docker-compose.example.yml"
-      - "ups.json"
+      - 'README.md'
+      - 'LICENSE.txt'
+      - 'docker-compose.example.yml'
+      - 'ups.json'
 
 env:
   REGISTRY: git.ngn.tf
@@ -20,6 +20,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          submodules: true
 
       - name: Login to container repo
         uses: docker/login-action@v1