Docker for mattermost in production

1. Put cert.pem into web/cert and key-no-password.pem into web/cert/private.
2. docker-compose up -d

The settings of the servers are based on
https://github.com/mattermost/platform/blob/master/doc/install/Production-Ubuntu.md.

app/config_docker.json is based on
https://raw.githubusercontent.com/mattermost/platform/master/config/config.json.

web/Dockerfile

@@ -0,0 +1,25 @@
+FROM ubuntu:14.04
+
+RUN apt-get update && apt-get install -y nginx
+
+RUN rm /etc/nginx/sites-enabled/default
+RUN ln -s /etc/nginx/sites-available/mattermost /etc/nginx/sites-enabled/mattermost
+
+ADD mattermost /etc/nginx/sites-available/
+ADD docker-entry.sh /
+
+RUN mkdir /cert
+ADD cert/cert.pem /cert
+ADD cert/private/key-no-password.pem /cert
+
+RUN chmod +x /docker-entry.sh
+
+# Define mountable directories.
+VOLUME ["/etc/nginx/sites-enabled", "/etc/nginx/certs", "/etc/nginx/conf.d", "/var/log/nginx", "/var/www/html"]
+
+# Define working directory.
+WORKDIR /etc/nginx
+
+ENTRYPOINT /docker-entry.sh
+
+EXPOSE 80 443