Documentation: Add docs on how to use a custom configuration
Documentation: Add docs on how to use a custom configuration

brancz/prometheus-operator,mmerrill3/prometheus-operator,mmerrill3/prometheus-operator,gianrubio/prometheus-operator,coreos/prometheus-operator,coreos/prometheus-operator,gianrubio/prometheus-operator,mmerrill3/prometheus-operator,jescarri/prometheus-operator,brancz/prometheus-operator,gianrubio/prometheus-operator,jescarri/prometheus-operator,brancz/prometheus-operator