Update Dockerfile

Author: anujajakhade

rpm/sles-15/Dockerfile

@@ -21,11 +21,9 @@ ENV SUITE=${SUITE}
 ENV CC=gcc
 USER root
 
-
-RUN zypper install -y rpm-build rpmlint pkg-config libsystemd0 systemd-devel selinux-tools wget cmake device-mapper-devel git glibc-devel-static libseccomp-devel libtool libarchive-devel  btrfsprogs libbtrfs-devel lsb-release
-
 COPY SPECS /usr/src/packages/SPECS
 COPY rpmbuild/SOURCES/ /usr/src/packages/SOURCES/
+RUN zypper -n install $(rpmspec --parse /usr/src/packages/SPECS/sles_dependencies.spec | grep BuildRequires | cut -d' ' -f2 | xargs)
 RUN rpmbuild -bb /usr/src/packages/SPECS/policycoreutils.spec
 RUN rpmbuild -bb /usr/src/packages/SPECS/checkpolicy.spec 
 RUN rpm -i /usr/src/packages/RPMS/s390x/policycoreutils-3.2-1.s390x.rpm && rpm -i /usr/src/packages/RPMS/s390x/checkpolicy-3.2.61.1-1.s390x.rpm \