clean-up apt repo + removed newline from test_cmds

Dockerfile

@@ -9,6 +9,7 @@ LABEL Description="rNMR: open source software for identifying and quantifying me
 MAINTAINER PhenoMeNal-H2020 Project <phenomenal-h2020-users@googlegroups.com>
 
 
+
 # Environment variables needed for installing with xvfb
 ENV DEBIAN_FRONTEND=noninteractive
 ENV DISPLAY=":1"
@@ -21,6 +22,9 @@ RUN echo "no"
 RUN apt-get -y update
 RUN apt-get -y install apt-utils coreutils git r-base r-cran-tcltk2 subversion subversion-tools wget xfonts-75dpi xfonts-100dpi xfstt xinit xterm xvfb
 
+# Clean-up
+RUN apt-get -y clean && apt-get -y autoremove && rm -rf /var/lib/{cache,log}/ /tmp/* /var/tmp/*
+
 # Fetch rNMR
 WORKDIR /usr/src
 RUN svn checkout svn://svn.code.sf.net/p/rnmr/code/ rnmr-code

test_cmds.txt

@@ -1,3 +1,2 @@
 test -d /usr/local/lib/R/site-library/rNMR
-xvfb-run R -e "library(rNMR)"
-
+/usr/bin/xvfb-run R -e "library(rNMR)"