New docker image based on Alpine Linux

docker/PowerDNS-Admin/Dockerfile

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+# PowerDNS-Admin
+# Original from:
+# https://github.com/ngoduykhanh/PowerDNS-Admin
+#
+# Initial image by winggundamth(/powerdns-mysql:trusty)
+#
+#
+FROM alpine
+MAINTAINER Jeroen Boonstra <jeroen [at] provider.nl>
+
+ENV APP_USER=web APP_NAME=powerdns-admin
+ENV APP_PATH=/home/$APP_USER/$APP_NAME
+
+
+RUN apk add --update \
+    sudo \
+    python \
+    libxml2 \
+    xmlsec \
+    git \
+    python-dev \
+    py-pip \
+    build-base  \
+    libxml2-dev \
+    xmlsec-dev \
+    libffi-dev \
+    openldap-dev \
+  && adduser -S web
+
+RUN sudo -u $APP_USER -H git clone --depth=1 \
+      https://github.com/thomasDOTde/PowerDNS-Admin $APP_PATH
+
+RUN pip install -r $APP_PATH/requirements.txt
+COPY docker-entrypoint.sh /docker-entrypoint.sh
+
+
+USER $APP_USER
+WORKDIR $APP_PATH
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["python", "run.py"]
+EXPOSE 9393
+VOLUME ["/var/log"]