Create reusable runner image build action

runner-image/Dockerfile

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+ARG BASE_IMAGE
+FROM ${BASE_IMAGE}
+
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+      ca-certificates \
+      git \
+      python3 \
+      python3-pip \
+      python3-venv \
+      tzdata && \
+    rm -rf /var/lib/apt/lists/*
+
+ARG REQUIREMENTS_FILE=requirements.lock
+COPY ${REQUIREMENTS_FILE} /tmp/requirements.lock
+
+RUN python3 -m venv /opt/runner-venv && \
+    /opt/runner-venv/bin/pip install --no-cache-dir -r /tmp/requirements.lock && \
+    /opt/runner-venv/bin/pip check && \
+    rm /tmp/requirements.lock
+
+ENV PATH="/opt/runner-venv/bin:$PATH" \
+    PYTHONDONTWRITEBYTECODE="1" \
+    PYTHONUNBUFFERED="1"
+
+CMD ["bash"]