message: convert from nginx:alpine to openresty:alpine; this has lua support
diff: ARG IMAGE_REPO
  FROM ${IMAGE_REPO:-lagoon}/commons as commons
  -FROM nginx:alpine
  +FROM openresty/openresty:alpine
  MAINTAINER amazee.io
  ENV LAGOON=nginx
  @@ -18,7 +18,7 @@ RUN chmod g+w /etc/passwd \
  # When Bash is invoked as non-interactive (like `bash -c command`) it sources a file that is given in `BASH_ENV`
  ENV TMPDIR=/tmp TMP=/tmp HOME=/home ENV=/home/.bashrc BASH_ENV=/home/.bashrc
  -RUN apk add --no-cache openssl
  +RUN rm -Rf /etc/nginx && ln -s /usr/local/openresty/nginx/conf /etc/nginx
  COPY nginx.conf /etc/nginx/nginx.conf
  COPY fastcgi.conf /etc/nginx/fastcgi.conf
  @@ -29,8 +29,7 @@ COPY redirects-map.conf /etc/nginx/redirects-map.conf
  RUN mkdir -p /app \
  && rm -f /etc/nginx/conf.d/default.conf \
  - && fix-permissions /etc/nginx/ \
  - && fix-permissions /var/cache/nginx \
  + && fix-permissions /usr/local/openresty/nginx/conf \
  && fix-permissions /var/run/
  COPY docker-entrypoint /lagoon/entrypoints/70-nginx-entrypoint
  