message: Update openresty to 1.17.8.2.
diff: ARG IMAGE_REPO
  FROM ${IMAGE_REPO:-lagoon}/commons as commons
  -# alpine 3.11 per https://github.com/openresty/docker-openresty/blob/master/alpine/Dockerfile
  -FROM openresty/openresty:1.15.8.2-alpine
  +# Alpine 3.11 per https://github.com/openresty/docker-openresty/blob/master/alpine/Dockerfile#L5
  +FROM openresty/openresty:1.17.8.2-alpine
  LABEL maintainer="amazee.io"
  ENV LAGOON=nginx
  