Add readiness probe to Helm chart and cleanup

.gitignore

production/helm/Chart.yaml

production/helm/templates/loki/_helpers.tpl

production/helm/templates/loki/deployment.yaml

production/helm/templates/loki/podsecuritypolicy.yaml

production/helm/templates/loki/role.yaml

production/helm/templates/loki/rolebinding.yaml

production/helm/templates/loki/service.yaml

production/helm/templates/promtail/daemonset.yaml

production/helm/templates/promtail/podsecuritypolicy.yaml

production/helm/templates/promtail/role.yaml

production/helm/templates/promtail/rolebinding.yaml

production/helm/values.yaml