Add discourse deployment playbook

ansible/.gitignore

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-*.retry
+*.retry
+.passwd

ansible/ansible.cfg

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 [defaults]
 roles_path=roles/
+vault_password_file = .passwd

ansible/group_vars/all/discourse_secrets.yml

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ansible/playbooks/30-discourse.yml

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+---
+- hosts: tachikoma
+  become: yes
+  tasks:
+    - name: Install Docker
+      apt:
+        name: docker.io
+        state: present
+    - name: Clone discourse git repo
+      git:
+        repo: https://github.com/discourse/discourse_docker.git
+        dest: /var/discourse
+    - name: Copy discourse configuration
+      template:
+        src: discourse/app.yml
+        dest: /var/discourse/containers/app.yml
+      notify: rebuild discourse
+  handlers:
+    - name: rebuild discourse
+      shell: /var/discourse/launcher rebuild app
+      args:
+        chdir: /var/discourse

ansible/playbooks/discourse/app.yml

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+{{ ansible_managed | comment }}
+## this is the all-in-one, standalone Discourse Docker container template
+##
+## After making changes to this file, you MUST rebuild
+## /var/discourse/launcher rebuild app
+##
+## BE *VERY* CAREFUL WHEN EDITING!
+## YAML FILES ARE SUPER SUPER SENSITIVE TO MISTAKES IN WHITESPACE OR ALIGNMENT!
+## visit http://www.yamllint.com/ to validate this file as needed
+
+templates:
+  - "templates/postgres.template.yml"
+  - "templates/redis.template.yml"
+  - "templates/web.template.yml"
+  - "templates/web.ratelimited.template.yml"
+  - "templates/web.socketed.template.yml"
+
+# No tcp ports since we're using a socket:
+expose:
+#  - "80:80"   # http
+#  - "443:443" # https
+
+params:
+  db_default_text_search_config: "pg_catalog.english"
+
+  ## Set db_shared_buffers to a max of 25% of the total memory.
+  ## will be set automatically by bootstrap based on detected RAM, or you can override
+  #db_shared_buffers: "2048MB"
+
+  ## can improve sorting performance, but adds memory usage per-connection
+  #db_work_mem: "40MB"
+
+  ## Which Git revision should this container use? (default: tests-passed)
+  #version: tests-passed
+
+env:
+  LANG: en_US.UTF-8
+  # DISCOURSE_DEFAULT_LOCALE: en
+
+  ## How many concurrent web requests are supported? Depends on memory and CPU cores.
+  ## will be set automatically by bootstrap based on detected CPUs, or you can override
+  UNICORN_WORKERS: 8
+
+  ## TODO: The domain name this Discourse instance will respond to
+  ## Required. Discourse will not work with a bare IP number.
+  DISCOURSE_HOSTNAME: discourse.queeriouslabs.com
+
+  ## Uncomment if you want the container to be started with the same
+  ## hostname (-h option) as specified above (default "$hostname-$config")
+  #DOCKER_USE_HOSTNAME: true
+
+  ## TODO: List of comma delimited emails that will be made admin and developer
+  ## on initial signup example '[email protected],[email protected]'
+  DISCOURSE_DEVELOPER_EMAILS: '{{ discourse_developer_email }}'
+
+  DISCOURSE_SMTP_ADDRESS: {{ discourse_smtp_server }}
+  DISCOURSE_SMTP_PORT: {{ discourse_smtp_port }}
+  DISCOURSE_SMTP_USER_NAME: {{ discourse_smtp_username }}
+  DISCOURSE_SMTP_PASSWORD: "{{ discourse_smtp_password }}"
+  #DISCOURSE_SMTP_ENABLE_START_TLS: true           # (optional, default true)
+
+  ## The CDN address for this Discourse instance (configured to pull)
+  ## see https://meta.discourse.org/t/14857 for details
+  #DISCOURSE_CDN_URL: //discourse-cdn.example.com
+
+## The Docker container is stateless; all data is stored in /shared
+volumes:
+  - volume:
+      host: /var/discourse/shared/standalone
+      guest: /shared
+  - volume:
+      host: /var/discourse/shared/standalone/log/var-log
+      guest: /var/log
+
+## Plugins go here
+## see https://meta.discourse.org/t/19157 for details
+hooks:
+  after_code:
+    - exec:
+        cd: $home/plugins
+        cmd:
+          - git clone https://github.com/discourse/docker_manager.git
+
+## Any custom commands to run after building
+run:
+  - exec: echo "Beginning of custom commands"
+  ## If you want to set the 'From' email address for your first registration, uncomment and change:
+  ## After getting the first signup email, re-comment the line. It only needs to run once.
+  #- exec: rails r "SiteSetting.notification_email='[email protected]'"
+  - exec: echo "End of custom commands"