Merge pull request #5 from bagage/fix/libjson-c3

Dockerfile: install required deps libjson-c3 (fix #4)

Dockerfile

@@ -42,14 +42,16 @@ RUN echo "deb [arch=amd64,i386] http://repo.steampowered.com/steam/ precise stea
 # Workaround missing lib in .local/share/Steam/ubuntu12_32/steamclient.so
 RUN ln -sv libudev.so.1 /lib/i386-linux-gnu/libudev.so.0
 
-# Workaround: Ubuntu 16.04 doesn't have libgcrypt11, so we take it from trusty
-# Required by Half-Life based games
+# Workaround: Ubuntu 16.04 doesn't have libgcrypt11 nor libjson-c3, so we take 
+# then from trusty
+# libcryptot11 is required by Half-Life based games
 # TODO: use debian mirrors if possible?
 ADD http://archive.ubuntu.com/ubuntu/pool/main/libg/libgcrypt11/libgcrypt11_1.5.3-2ubuntu4_i386.deb /tmp/libgcrypt11_i386.deb
 ADD http://archive.ubuntu.com/ubuntu/pool/main/libg/libgcrypt11/libgcrypt11_1.5.3-2ubuntu4_amd64.deb /tmp/libgcrypt11_amd64.deb
+ADD http://ftp.de.debian.org/debian/pool/main/j/json-c/libjson-c3_0.12.1-1_amd64.deb /tmp/libjson-c3_amd64.deb
 RUN cd /tmp && \
-    dpkg -i libgcrypt11_*.deb && \
-    rm -f libgcrypt11_*.deb
+    dpkg -i *.deb && \
+    rm -f *.deb
 
 
 # locale-gen: Generate locales based on /etc/locale.gen file