Fix #417. Add Dokku command (kudos to @Cri5)

pages/common/dokku.md

@@ -0,0 +1,24 @@
+# Dokku
+
+> Docker powered mini-Heroku (PaaS).
+> Easily deploy multiple apps to your server in different languages using a single `git-push` command.
+
+- List runinng apps:
+
+`dokku apps`
+
+- Create an app:
+
+`dokku apps:create {{app_name}}`
+
+- Remove an app:
+
+`dokku apps:destroy {{app_name}}`
+
+- Install plugin:
+
+`dokku plugin:install {{full_repo_url}}`
+
+- Link database to an app:
+
+`dokku {{db}}:link {{db_name}} {{app_name}}`