Added proposed Docker Community Guidelines

Docker-DCO-1.1-Signed-off-by: James Turnbull <james@lovedthanlost.net> (github: jamtur01)

CONTRIBUTING.md

@@ -208,3 +208,64 @@ Don't forget: being a maintainer is a time investment. Make sure you
 will have time to make yourself available.  You don't have to be a
 maintainer to make a difference on the project!
 
+## Docker Community Guidelines
+
+We want to keep the Docker community awesome, growing and collaborative. We
+need your help to keep it that way. To help with this we've come up with some
+general guidelines for the community as a whole:
+
+* Be nice: Be courteous, respectful and polite to fellow community members: no
+  regional, racial, gender, or other abuse will be tolerated. We like nice people
+  way better than mean ones!
+
+* Encourage diversity and participation: Make everyone in our community
+  feel welcome, regardless of their background and the extent of their
+  contributions, and do everything possible to encourage participation in
+  our community.
+
+* Keep it legal: Basically, don't get us in trouble. Share only content that
+  you own, do not share private or sensitive information, and don't break the
+  law.
+
+* Stay on topic: Make sure that you are posting to the correct channel
+  and avoid off-topic discussions. Remember when you update an issue or
+  respond to an email you are potentially sending to a large number of
+  people.  Please consider this before you update.  Also remember that
+  nobody likes spam.
+
+### Guideline Violations — 3 Strikes Method
+
+The point of this section is not to find opportunities to punish people, but we
+do need a fair way to deal with people who are making our community suck.
+
+1. First occurrence: We'll give you a friendly, but public reminder that the
+   behavior is inappropriate according to our guidelines.
+
+2. Second occurrence: We will send you a private message with a warning that
+   any additional violations will result in removal from the community.
+
+3. Third occurrence: Depending on the violation, we may need to delete or ban
+   your account.
+
+**Notes:**
+
+* Obvious spammers are banned on first occurrence. If we don't do this, we'll
+  have spam all over the place.
+
+* Violations are forgiven after 6 months of good behavior, and we won't
+  hold a grudge.
+
+* People who commit minor infractions will get some education,
+  rather than hammering them in the 3 strikes process.
+
+* The rules apply equally to everyone in the community, no matter how
+  much you've contributed.
+
+* Extreme violations of a threatening, abusive, destructive or illegal nature
+  will be addressed immediately and are not subject to 3 strikes or
+  forgiveness.
+
+* Contact james@docker.com to report abuse or appeal violations. In the case of
+  appeals, we know that mistakes happen, and we'll work with you to come up with
+  a fair solution if there has been a misunderstanding.
+