chore: add almalinux8 rpm builds

CentOS Stream8 will be EOL soon, so this adds alternative for rpm
builds

images/rpmbuild-almalinux8/Dockerfile

@@ -0,0 +1,18 @@
+FROM ghcr.io/geonet/base-images/almalinux:8.9
+# Install prerequisites
+RUN dnf module enable -y nodejs:20 \
+  && dnf install -y epel-release 'dnf-command(config-manager)' \
+  && dnf config-manager --set-enabled powertools
+# Update system
+RUN dnf update -y && \
+  dnf install -y boost automake boost-filesystem boost-iostreams \
+  boost-program-options boost-regex boost-signals boost-system \
+  boost-thread cairo cairo-devel dnf-plugins-core fontconfig \
+  fontconfig-devel freetype freetype-devel gcc gcc-c++ git glibc \
+  kernel-devel libdbi libdbi-devel libgfortran libxml2 \
+  libxml2-devel make ncurses ncurses-devel nodejs npm octave \
+  openssl pango pango-devel perl-devel python3.6 python3.11 qt5-qtwebengine \
+  rpm-build rpmdevtools rpm-sign rpmlint shadow-utils systemd unzip
+
+RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" && unzip awscliv2.zip
+RUN ./aws/install