Consolidate readme/wiki docs into organized docs folder

docs/remote-commands.md

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+# Remote commands
+
+Dokku commands can be run over ssh. Anywhere you would run `dokku <command>`, just run `ssh -t dokku@progriumapp.com <command>`
+The `-t` is used to request a pty. It is highly recommended to do so.
+To avoid the need to type the `-t` option each time, simply create/modify a section in the `.ssh/config` on the client side, as follows:
+
+```
+Host progriumapp.com
+RequestTTY yes
+```
+
+## Run a command in the app environment
+
+It's possible to run commands in the environment of the deployed application:
+
+```bash
+dokku run node-js-app ls -alh
+dokku run <app> <cmd>
+```