Projet parsing method tries to get a non existing project['healthReport'] first item.
Stacktrace
/usr/src/app/tommy.rb in block in parse_incoming_json
build_score: project['healthReport'].first['score'].to_i,
/usr/src/app/tommy.rb in each
projects.each do |project|
/usr/src/app/tommy.rb in parse_incoming_json
projects.each do |project|
...