works for dokku v0.2.3 aswell

install_dokku_to_debian_wheezy

#######################################################################################################################
#
# Purpose: Bash script to fix a few elements of the default Dokku script with running correctly on Debian Wheezy
# Author: Shirkey <dev@shirkey.me>
# License: MIT
# Tested with:
#   * Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2+deb7u2 x86_64 GNU/Linux
#   * v0.2.1 of Dokku installer script
#
#######################################################################################################################
# 
# update apt sources for nginx, hashes to avoid issues with Ubuntu-specific 
# repositories that are overwritten during docker-plugins-install step
#
cat > /etc/apt/sources.list.d/nginx-stable-wheezy.list << EOF
deb http://packages.dotdeb.org wheezy all
deb-src http://packages.dotdeb.org wheezy all
#
#
EOF
#
wget -qO- http://www.dotdeb.org/dotdeb.gpg | apt-key add - && apt-get update
#
#
# Install for apt-add-repository commands
apt-get install -y python-software-properties
#
#
# Run the installer script
wget -qO- https://raw.github.com/progrium/dokku/v0.2.3/bootstrap.sh | sudo DOKKU_TAG=v0.2.3 bash


----

alternative: https://github.com/jro7/dokku-debian