Updates to support PHP on current dokku

Does the following:

1.  Creates user dokku as uid/guid 1000 and runs server as this instead of nobody.  This supports the very nice [dokku-volume](https://github.com/ohardy/dokku-volume) plugin, which mounts volumes as user dokku (uid/guid 1000).  Otherwise, unable to write to persistent volumes
2.  Creates /root/bin prior to downloading/installing jq
3.  If adding nginx-include parameters, the following error occurs:

> nginx: [emerg] could not build the types_hash, you should increase either types_hash_max_size

To resolve, adding **types_hash_max_size 2048;**