Add demonstration of TIER logging feature

The other parts of the environment (repo, base image, etc) are temporary.

logging/Dockerfile

@@ -0,0 +1,32 @@
+#
+#  Just a demonstration of how to use TIER logging feature of midPoint.
+#  It requires v3.9devel-262-g2778b2c or later.
+#
+#  This is derived from Evolveum's dockerization; this will be changed.
+#
+#  Building:      (assumes midpoint-3.9-SNAPSHOT-dist.tar.gz is present in the current directory)
+#
+#    docker build -t mp-h2 .
+#
+#  Running:
+#
+#    docker run -e ENV=testing -e USERTOKEN=3.9 mp-h2
+#
+
+FROM openjdk:8-jdk-alpine
+
+MAINTAINER info@evolveum.com
+
+ARG MP_VERSION=3.9-SNAPSHOT
+ARG MP_DIST_FILE=midpoint-${MP_VERSION}-dist.tar.gz
+
+ENV MP_DIR /opt/midpoint
+
+RUN mkdir -p ${MP_DIR}/var
+
+COPY ${MP_DIST_FILE} ${MP_DIR}
+
+RUN echo 'Extracting midPoint archive...' \
+ && tar xzf ${MP_DIR}/midpoint-${MP_VERSION}-dist.tar.gz -C ${MP_DIR} --strip-components=1
+
+CMD java -Xmx2048M -Xms2048M -Dfile.encoding=UTF8 -Dmidpoint.home=$MP_DIR/var -Dmidpoint.logging.console.enabled=true -Dmidpoint.logging.console.prefix="midpoint;midpoint.log;$ENV;$USERTOKEN;" -Dmidpoint.logging.console.timezone=UTC -jar $MP_DIR/lib/midpoint.war