This works!

Dockerfile

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+# Use a common python image
+FROM python:3.10-slim
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+    wget \
+    git \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+# Download and install Hugo
+RUN wget -O /tmp/hugo.deb "https://github.com/gohugoio/hugo/releases/download/v0.129.0/hugo_extended_0.129.0_linux-amd64.deb" \
+    && dpkg -i /tmp/hugo.deb \
+    && rm /tmp/hugo.deb
+
+# Create a directory for the site
+WORKDIR /app
+
+# Copy the update script and Python script
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+COPY update-site.py /usr/local/bin/update-site.py
+
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
+# Run the update script in a loop
+CMD ["/bin/sh", "-c", "while true; do /usr/local/bin/entrypoint.sh; sleep 30; done"]