Add docker file

Dockerfile

+FROM python:3.7-slim AS compile-image
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN { \
+        echo krb5-config krb5-config/default_realm string 'LOCAL.ISIMA.FR'; \
+        echo tzdata tzdata/Areas string 'Etc'; \
+        echo tzdata tzdata/Zones/Etc string 'UTC'; \
+    } | debconf-set-selections \
+    && \
+    apt-get update && apt-get install -y --no-install-recommends \
+        build-essential \
+        gcc \
+        apt-utils \
+        krb5-user \
+        locales \
+        rsync \
+    && \
+    locale-gen fr_FR \
+    locale-gen fr_FR.UTF-8 \
+    update-locale LANG=fr_FR.UTF-8 \
+    . /etc/default/locale
+
+COPY requirements.txt .
+RUN pip install --user -r requirements.txt
+
+FROM python:3.7-slim AS build-image
+COPY --from=compile-image /root/.local /root/.local
+COPY --from=compile-image /usr/bin /usr/bin
+COPY --from=compile-image /usr/lib/x86_64-linux-gnu /usr/lib/x86_64-linux-gnu
+LABEL stage=builder
+
+ENV SRV_DIR=//srv
+ENV WORKING_DIR=//srv/pelican
+ENV PORT=8000
+ENV PATH=/root/.local/bin:$PATH
+
+ADD . $SRV_DIR
+WORKDIR $WORKING_DIR
+RUN mkdir output content cache
+VOLUME ["$WORKING_DIR/"]
+
+# make python server in foreground
+RUN sed -i 's/\$port &/\$port/g' $SRV_DIR/develop_server.sh
+
+RUN chmod +x $SRV_DIR/develop_server.sh
+
+EXPOSE $PORT
+
+ENTRYPOINT $SRV_DIR/develop_server.sh start $PORT
+