update Dockerfile

Dockerfile

@@ -3,12 +3,12 @@ ARG BRANCH_NAME=master
 ENV BRANCH_NAME ${BRANCH_NAME}
 ENV TINI_VERSION v0.19.0
 ENV KOMETA_DOCKER True
-COPY . /
+COPY requirements.txt requirements.txt
 RUN echo "**** install system packages ****" \
  && apt-get update \
  && apt-get upgrade -y --no-install-recommends \
  && apt-get install -y tzdata --no-install-recommends \
- && apt-get install -y gcc g++ libxml2-dev libxslt-dev libz-dev libjpeg62-turbo-dev zlib1g-dev wget curl \
+ && apt-get install -y gcc g++ libxml2-dev libxslt-dev libz-dev libjpeg62-turbo-dev zlib1g-dev wget curl nano \
  && wget -O /tini https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini-"$(dpkg --print-architecture | awk -F- '{ print $NF }')" \
  && chmod +x /tini \
  && pip3 install --no-cache-dir --upgrade --requirement /requirements.txt \
@@ -19,5 +19,6 @@ RUN echo "**** install system packages ****" \
  && apt-get -f install \
  && apt-get autoclean \
  && rm -rf /requirements.txt /tmp/* /var/tmp/* /var/lib/apt/lists/*
+ COPY . /
 VOLUME /config
 ENTRYPOINT ["/tini", "-s", "python3", "imagemaid.py", "--"]