Add the memcache(d) Dockerfile

dockerfiles/images/memcache/Dockerfile

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+FROM ubuntu
+
+# Set the file maintainer (your name - the file's author)
+MAINTAINER Borja Burgos <borja@tutum.co>
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# Update the default application repository sources list
+RUN apt-get update
+
+# Install Memcached
+RUN apt-get install -y memcached
+
+# Port to expose (default: 11211)
+EXPOSE 11211
+
+# Default Memcached run command arguments
+# Change to limit memory when creating container in Tutum 
+CMD ["-m", "64"]
+
+# Set the user to run Memcached daemon
+USER daemon
+
+# Set the entrypoint to memcached binary
+ENTRYPOINT memcached
+