Update so that tzdata doesn't ask for user answer when setting the timezone data

Author: mmoqui

Dockerfile

@@ -8,14 +8,19 @@ ENV TERM=xterm
 # Install required and recommended programs for Silverpeas
 #
 
-# Installation of ImageMagick, Ghostscript, and then
-# the dependencies required to build SWFTools and PDF2JSON
-RUN apt-get update && apt-get install -y \
+# Installation of LibreOffice, ImageMagick, Ghostscript, and then
+# the dependencies required to run SWFTools and PDF2JSON
+RUN apt-get update \
+  && apt-get install -y tzdata \ 
+  && apt-get install -y \
+    apt-utils \
+    iputils-ping \
+    curl \
     wget \
+    vim \
     locales \
     language-pack-en \
     language-pack-fr \
-    tzdata \
     procps \
     net-tools \
     zip \