diff --git a/.gitea/workflows/check.yml b/.gitea/workflows/check.yml
new file mode 100644
index 0000000..aca7a51
--- /dev/null
+++ b/.gitea/workflows/check.yml
@@ -0,0 +1,9 @@
+name: check
+on: [push]
+jobs:
+    check:
+        runs-on: ubuntu-latest
+        steps:
+            # actions/checkout v4.2.2, 2026-02-22
+            - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+            - run: docker build .