cleaup packages and add epel-release

Dockerfile

@@ -1,41 +1,42 @@
 FROM centos:7
 
 LABEL maintainer="Robert Kaussow <mail@geeklabor.de>" \
-  org.label-schema.name="rpmbuild" \
-  org.label-schema.vcs-url="https://gitea.rknet.org/docker/rpmbuild" \
-  org.label-schema.vendor="Robert Kaussow" \
-  org.label-schema.schema-version="1.0"
+    org.label-schema.name="rpmbuild" \
+    org.label-schema.vcs-url="https://gitea.rknet.org/docker/rpmbuild" \
+    org.label-schema.vendor="Robert Kaussow" \
+    org.label-schema.schema-version="1.0"
 
-RUN yum-config-manager --add-repo http://www.nasm.us/nasm.repo && \ 
-  yum install -y \
-  gcc gcc-c++ \
-  libtool libtool-ltdl \
-  gnutls \
-  gnutls-devel \
-  pam-devel \
-  dbus-devel \
-  avahi-devel \
-  systemd-devel \
-  make cmake \
-  git \
-  bzip2 \
-  bzip2-devel \
-  freetype-devel \
-  fribidi-devel \
-  expat-devel \
-  gperf \
-  nasm \
-  perl \
-  python \
-  yasm \
-  which \
-  libva-devel \
-  zlib-devel \
-  pkgconfig \
-  wget curl \
-  automake autoconf \
-  yum-utils rpm-build && \
-  yum clean all
+RUN yum install -q -y \
+    gcc gcc-c++ \
+    libtool libtool-ltdl \
+    pam-devel \
+    dbus-devel \
+    avahi-devel \
+    systemd-devel \
+    make cmake \
+    git \
+    bzip2 \
+    bzip2-devel \
+    freetype-devel \
+    fribidi-devel \
+    expat-devel \
+    gperf \
+    nasm \
+    perl \
+    python \
+    yasm \
+    which \
+    libva-devel \
+    zlib-devel \
+    pkgconfig \
+    wget curl \
+    automake autoconf \
+    yum-utils rpm-build \
+    epel-release && \
+    yum clean all && \
+    echo '%_topdir /drone/src' > /root/.rpmmacros
 
 USER root
-CMD /srv/pkg
+
+WORKDIR /drone/src
+CMD []