Install postgresql before extensions/repo

Author: athornton

cadc-postgresql-dev/Dockerfile

@@ -8,9 +8,11 @@ ARG PGDG=https://download.postgresql.org/pub/repos/yum/reporpms/F-42-x86_64/pgdg
 ARG PGSERVER="postgresql15-server postgresql15-contrib"
 ARG PGSPHERE=https://ws-cadc.canfar.net/vault/files/pdowler/rpms/pgsphere15-1.4.2-1.fc42.x86_64.rpm
 
-# install repositories, server, extensions
-RUN dnf -y install ${PGDG} \
-    && dnf -y install ${PGSERVER} ${PGSPHERE} \
+# install server, repositories, extensions.  Server first because $PGDG
+# requires /var/lib/pgsql to exist first.
+RUN dnf -y install ${PGSERVER} \
+    && dnf -y install ${PGDG} ${PGSPHERE} \
+    && dnf -y install \
     && dnf -y clean all
 
 RUN mkdir -p /config /logs /var/lib/pgsql/15