message: Update images/nginx/Dockerfile to reflect 3.11 dependency
diff: ARG IMAGE_REPO
  FROM ${IMAGE_REPO:-lagoon}/commons as commons
  -# alpine 3.9 per https://github.com/openresty/docker-openresty/blob/master/alpine/Dockerfile
  +# alpine 3.11 per https://github.com/openresty/docker-openresty/blob/master/alpine/Dockerfile
  FROM openresty/openresty:1.15.8.2-alpine
  LABEL maintainer="amazee.io"
  