content: # Stage 1: Build stage
  ARG BUILD_FROM
  FROM $BUILD_FROM AS build
  
  # Install apt packages
  COPY apt-packages.txt /tmp/
  RUN apt update && \
      xargs -a /tmp/apt-packages.txt apt install -y && \
      rm /tmp/apt-packages.txt && \
      apt clean && \
      rm -rf /var/lib/apt/lists/*
  
  # Install Python packages
  COPY requirements.txt /tmp/
  RUN update-ca-certificates \
      && pip install --no-cache-dir --requirement /tmp/requirements.txt && \
      rm /tmp/requirements.txt
  
  # Metadata
  LABEL description="Base image for FaaSr"
  