diff --git a/runner/Dockerfile b/runner/Dockerfile
index 4e8f892..1a5cb3d 100644
--- a/runner/Dockerfile
+++ b/runner/Dockerfile
@@ -25,6 +25,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     nsis \
     nsis-common \
     nsis-pluginapi \
+    nodejs \
+    npm \
     python3 \
     python3-dev \
     libpython3-dev \
@@ -37,6 +39,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
+# Verify Node.js runtime for Act / Gitea Actions
+RUN node --version && npm --version
+
 # Verify NSIS makensis binary
 RUN which makensis && makensis -VERSION