installer: Configure local git for access to repos
installer: Configure local git for access to repos

This ensures that users can deploy using local git as well as the dashboard.

Closes #1847

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

josephglanville/flynn,philiplb/flynn,benbjohnson/flynn,jzila/flynn,rikur/flynn,rikur/flynn,clifff/flynn,jzila/flynn,whouses/flynn,rikur/flynn,shads196770/flynn,benbjohnson/flynn,clifff/flynn,shads196770/flynn,clifff/flynn,shads196770/flynn,benbjohnson/flynn,flynn/flynn,josephglanville/flynn,lmars/flynn,flynn/flynn,josephglanville/flynn,whouses/flynn,shads196770/flynn,flynn/flynn,lmars/flynn,clifff/flynn,josephglanville/flynn,rikur/flynn,benbjohnson/flynn,whouses/flynn,flynn/flynn,flynn/flynn,shads196770/flynn,philiplb/flynn,philiplb/flynn,benbjohnson/flynn,whouses/flynn,jzila/flynn,lmars/flynn,jzila/flynn,josephglanville/flynn,lmars/flynn,jzila/flynn,shads196770/flynn,benbjohnson/flynn,lmars/flynn,jzila/flynn,clifff/flynn,rikur/flynn,philiplb/flynn,josephglanville/flynn,whouses/flynn,whouses/flynn,philiplb/flynn,clifff/flynn,rikur/flynn