optimize dockerfile

Author: Martin Hoefling

Dockerfile

@@ -2,10 +2,10 @@ FROM      martinhoefling/salt-minion:debian
 MAINTAINER Martin Hoefling <[email protected]>
 
 # push formula
-ADD dovecot /srv/salt/dovecot
-ADD pillar.example /srv/pillar/example.sls
-RUN echo "file_client: local" > /etc/salt/minion.d/local.conf
-RUN echo "base:" > /srv/pillar/top.sls
-RUN echo "  '*':" >> /srv/pillar/top.sls
-RUN echo "    - example" >> /srv/pillar/top.sls
-RUN salt-call --local state.sls dovecot | tee log.txt && grep "Failed:    0" log.txt
+COPY dovecot /srv/salt/dovecot
+COPY pillar.example /srv/pillar/example.sls
+RUN echo "file_client: local" > /etc/salt/minion.d/local.conf && \
+    echo "base:" > /srv/pillar/top.sls  && \
+    echo "  '*':" >> /srv/pillar/top.sls  && \
+    echo "    - example" >> /srv/pillar/top.sls && \
+    salt-call --local state.sls dovecot | tee log.txt && grep "Failed:    0" log.txt