diff --git a/.gitea/docker/Dockerfile.php-ci b/.gitea/docker/Dockerfile.php-ci
new file mode 100644
index 00000000..f7fab2b6
--- /dev/null
+++ b/.gitea/docker/Dockerfile.php-ci
@@ -0,0 +1,10 @@
+FROM mcr.microsoft.com/devcontainers/php:8.3
+
+# Install Node.js for actions/checkout@v4 post-step compatibility
+# This is a Node.js 20 action and its post-step runs inside the container
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends nodejs && \
+    rm -rf /var/lib/apt/lists/*
+
+# Verify node is available (required for JavaScript actions via act)
+RUN node --version