Fix filepath and add comments

ARG PROJECT=nsd-app-wrap

ARG PKG_PATH=/var/www/html/distros/rhel/7/sns/RPMS/noarch

RUN useradd $SSH_USER

ENV HOME /home/$SSH_USER

# setup the user account

RUN useradd ${SSH_USER}

ENV HOME /home/${SSH_USER}

WORKDIR $HOME

# install dependencies

RUN yum install -y git rpm-build && yum clean all && rm -rf /var/cache/yum

USER $SSH_USER

# change user for the actual build

USER ${SSH_USER}

# setup ssh key

RUN mkdir -p .ssh && chmod 700 .ssh

RUN echo "${SSH_KEY}" > .ssh/id_rsa && chmod 600 .ssh/id_rsa

# copy in the source tree

COPY . .

RUN $HOME/rpmbuild.sh

# build the RPM

RUN ./rpmbuild.sh

RUN scp -o StrictHostKeyChecking=no ${HOME}/rpmbuild/RPM/noarch/${PROJECT}*.noarch.rpm $SSH_USER@packages.sns.gov:${PKG_PATH}

# copy to packages.sns.gov

RUN scp -o StrictHostKeyChecking=no ${HOME}/rpmbuild/RPMS/noarch/${PROJECT}*.noarch.rpm $SSH_USER@packages.sns.gov:${PKG_PATH}