Resolve "Integrate ELK stack with Fluentd"

Closes #9 (closed)

fluentd/Dockerfile

+#------------------------------------------------------------------------------
+#
+# Project: prism view server
+# Authors: Stephan Meissl <stephan.meissl@eox.at>
+#
+#------------------------------------------------------------------------------
+# Copyright (C) 2018 EOX IT Services GmbH <https://eox.at>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies of this Software or works derived from this Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#-----------------------------------------------------------------------------
+
+FROM fluent/fluentd:v1.11.2-debian-1.0
+
+MAINTAINER EOX
+LABEL name="prism view server cache" \
+      vendor="EOX IT Services GmbH <https://eox.at>" \
+      license="MIT Copyright (C) 2019 EOX IT Services GmbH <https://eox.at>" \
+      type="prism view server fluentd" \
+      version="0.0.1-dev"
+
+USER root
+RUN gem install fluent-plugin-elasticsearch \
+ && gem install fluent-plugin-rewrite-tag-filter
+USER fluent