put blockchain cache in image

Dockerfile

@@ -1,5 +1,7 @@
 FROM phusion/baseimage:0.9.19
 
+ARG STEEMD_BLOCKCHAIN=https://cdn.datavibe.net/f/eeqj/20160906.steemd-blockchain.tbz2
+
 # steem:master as of 2016-08-18
 ARG STEEMD_REPO=https://github.com/steemit/steem.git
 ARG STEEMD_REV=master
@@ -35,6 +37,7 @@ RUN \
         libssl-dev \
         libtool \
         ncurses-dev \
+        pbzip2 \
         python3 \
         python3-dev \
     && \
@@ -117,9 +120,14 @@ RUN \
         /var/lib/apt/lists/* \
         /tmp/* \
         /var/tmp/* \
+        /var/cache/* \
         /usr/include \
         /usr/local/include
 
+# add blockchain cache to image
+ADD $STEEMD_BLOCKCHAIN /var/cache/steemd/blocks.tbz2
+
+RUN chmod a+rx /var/cache/steemd /var/cache/steemd/*
 
 ENV HOME /var/lib/steemd
 RUN useradd -s /bin/bash -m -d /var/lib/steemd steemd