Move bundle installation to entrypoint script

Makes it one step less you have to do in the dev-env setup.

bin/osem-init.sh

@@ -1,3 +1,9 @@
 #!/bin/bash
+# Configure our bundle
+export NOKOGIRI_USE_SYSTEM_LIBRARIES=1
+# Install our bundle if it's outdated
+bundle check || bundle install --jobs=3 --retry=3
+# Setup the app if it isn't already setup
 bundle exec rake setup:bootstrap
+# Start the app
 foreman start