Create CONTRIBUTING.md file with develop branch guideline
Create CONTRIBUTING.md file with develop branch guideline

[#92459188]

Signed-off-by: Colin Jackson <a89a308d481f83b953c5ad185298958072312fde@gmail.com>

jimlindeman/python-buildpack-collectd,andrespires/python-buildpack,gitricko/apt-python-buildpack,liyanchang/cloudfoundary-buildbot-buildpack,kowito/python-buildpack,cloudfoundry/python-buildpack,18F/python-buildpack,pkumar-appd/python-buildpack,joshisa/python-buildpack,gitricko/apt-python-buildpack,pkumar-appd/python-buildpack,andrespires/python-buildpack,gitricko/apt-python-buildpack,jimlindeman/python-buildpack-collectd,jimlindeman/python-buildpack-collectd,Nazanin84/python-buildpack,liyanchang/cloudfoundary-buildbot-buildpack,cloudfoundry/python-buildpack,pkumar-appd/python-buildpack,Nazanin84/python-buildpack,liyanchang/cloudfoundary-buildbot-buildpack,18F/python-buildpack,kowito/python-buildpack,joshisa/python-buildpack,andrespires/python-buildpack,kowito/python-buildpack,cloudfoundry/python-buildpack,joshisa/python-buildpack,18F/python-buildpack,Nazanin84/python-buildpack