ARG FROM=python:3.6 FROM ${FROM} VOLUME /var/pegleg WORKDIR /var/pegleg ARG ctx_base=src/bin/pegleg COPY ${ctx_base}/requirements.txt /opt/pegleg/requirements.txt RUN pip3 install --no-cache-dir -r /opt/pegleg/requirements.txt COPY ${ctx_base} /opt/pegleg RUN pip3 install -e /opt/pegleg