Added docker support

Signed-off-by: Janos SUTO <sj@acts.hu>

docker/Dockerfile

@@ -0,0 +1,47 @@
+FROM ubuntu:18.04
+
+ARG PACKAGE
+
+LABEL description="piler container" \
+      maintainer="Janos SUTO, sj@acts.hu"
+      package="${PACKAGE}"
+
+ENV DEBIAN_FRONTEND="noninteractive" \
+    DISTRO="bionic" \
+    DOWNLOAD_URL="https://download.mailpiler.com" \
+    PILER_USER="piler" \
+    MYSQL_HOSTNAME="localhost" \
+    MYSQL_DATABASE="piler" \
+    MYSQL_PILER_PASSWORD="piler123" \
+    MYSQL_ROOT_PASSWORD="abcde123" \
+    SPHINX_BIN_TARGZ="sphinx-3.1.1-bin.tar.gz"
+
+ADD "https://bitbucket.org/jsuto/piler/downloads/${PACKAGE}" "/${PACKAGE}"
+ADD files/start.sh /start.sh 
+
+RUN apt-get update && \
+    apt-get -y --no-install-recommends install \
+       wget rsyslog openssl sysstat php7.2-cli php7.2-cgi php7.2-mysql php7.2-fpm php7.2-zip php7.2-ldap \
+       php7.2-gd php7.2-curl php7.2-xml catdoc unrtf poppler-utils nginx tnef sudo libodbc1 libpq5 libzip4 \
+       libtre5 libwrap0 cron libmariadb3 libmysqlclient-dev python python-mysqldb mariadb-server && \
+    service mysql start && mysqladmin -u root password ${MYSQL_ROOT_PASSWORD} && \
+    wget --no-check-certificate -q -O ${SPHINX_BIN_TARGZ} ${DOWNLOAD_URL}/generic-local/${SPHINX_BIN_TARGZ} && \
+    tar zxvf ${SPHINX_BIN_TARGZ} && \
+    rm -f ${SPHINX_BIN_TARGZ} && \
+    sed -i 's/mail.[iwe].*//' /etc/rsyslog.conf && \
+    sed -i '/session    required     pam_loginuid.so/c\#session    required     pam_loginuid.so' /etc/pam.d/cron && \
+    mkdir /etc/piler && \
+    printf "[mysql]\nuser = piler\npassword = ${MYSQL_PILER_PASSWORD}\n" > /etc/piler/.my.cnf && \
+    printf "[mysql]\nuser = root\npassword = ${MYSQL_ROOT_PASSWORD}\n" > /root/.my.cnf && \
+    echo "alias mysql='mysql --defaults-file=/etc/piler/.my.cnf'" > /root/.bashrc && \
+    echo "alias t='tail -f /var/log/syslog'" >> /root/.bashrc && \
+    dpkg -i $PACKAGE && \
+    crontab -u $PILER_USER /usr/share/piler/piler.cron && \
+    touch /var/log/mail.log && \
+    rm -f $PACKAGE /etc/nginx/sites-enabled/default && \
+    sed -i 's/#ngram/ngram/g' /etc/piler/sphinx.conf.dist && \
+    sed -i 's/220/311/g' /etc/piler/sphinx.conf.dist
+
+EXPOSE 25 80 443
+VOLUME ["/var/piler"]
+CMD ["/start.sh"]