Update Dockerfile.production
Update Dockerfile.production

Update Dockerfile.production's FROM to ruby:2.4.4

This should have been done in commit
77e2371091e799a68c8a255db33fc85351434fef.
mlorb/scinote-web,Ducz0r/scinote-web,Ducz0r/scinote-web,Ducz0r/scinote-web,mlorb/scinote-web,mlorb/scinote-web