Update subsetservice image to Rocky Linux base.

docker/main/subsetservice/Dockerfile

@@ -3,27 +3,22 @@
 ARG docker_internal_registry
 FROM ${docker_internal_registry}/dmod-py-sources as sources
 
-# Need to use base, rather than -alpine, image variant, due to C++ lib
-# dependencies related to pandas when using the monitordata package.
-#FROM python:3.8
+FROM rockylinux:8.5
 
-FROM python:3.8-alpine3.15
+# Do this separately at the beginning to get some caching help
+RUN dnf update -y && \
+    dnf install -y python39 python39-pip git \
+    && ln -s /usr/bin/pip3 /usr/bin/pip \
+    && ln -s /usr/bin/python3 /usr/bin/python
 
 ARG comms_package_name
 ARG modeldata_package_name
 ARG subsetservice_package_name
 
 WORKDIR /code
 
-# Needed until subsetservice package dependencies like hypy, etc. are publish, as opposed to pulled via git
-#ARG REQUIRE="git gcc gfortran musl-dev python3-dev libpng-dev"
-#RUN apk update && apk upgrade && apk add --no-cache ${REQUIRE}
-#RUN apt-get update && apt-get upgrade && apt-get -y install ${REQUIRE}
-#RUN ln -s /usr/lib/x86_64-linux-musl/libc.so /lib/libc.musl-x86_64.so.1
-
-#RUN echo "http://dl-8.alpinelinux.org/alpine/edge/community" >> /etc/apk/repositories
-RUN apk --no-cache --update-cache add git gcc gfortran python3 python3-dev py-pip build-base wget geos-dev gdal-dev freetype-dev libpng-dev openblas-dev proj proj-dev proj-util
-RUN ln -s /usr/include/locale.h /usr/include/xlocale.h
+# Might need to make sure some of these are installed later via 'dnf install -y` (now that we've moved to Rocky Linux)
+# git gcc gfortran python3 python3-dev py-pip build-base wget geos-dev gdal-dev freetype-dev libpng-dev openblas-dev proj proj-dev proj-util
 
 # Copy custom built packages from external sources image
 COPY --from=sources /DIST /DIST
@@ -32,8 +27,8 @@ COPY ./entrypoint.sh entrypoint.sh
 # Install custom and generally available packages, starting with any custom from external source image
 # Do these first packages separately first to work around some current issues (2/1/2022)
 # TODO: fix root cause for problem this works around
-RUN pip install websockets MarkupSafe yarl wrapt \
-    && pip install --no-index --find-links=/DIST ${subsetservice_package_name} \
+RUN pip install --no-cache websockets MarkupSafe yarl wrapt \
+    && pip install --no-cache --find-links=/DIST ${subsetservice_package_name} \
     # After eventually installing all custom packages like this, clean up ... \
     && rm -r /DIST