Chaning stg dockerfile to use ubuntu 16.04, minor changes to use vps4 for staging

Dockerfile_stg

@@ -1,6 +1,6 @@
 # This is 99% the same as the prod one. I should do something smarter here.
 
-FROM ubuntu:lucid
+FROM ubuntu:16.04
 
 # Set environment variables.
 ENV HOME /root

deploy/deploy-stg.sh

@@ -21,7 +21,7 @@ fi
 
 echo "Starting staging deployment for cmc-sales..."
 echo "Setting variables..."
-SERVER="cmc"
+SERVER="cmc-sales"
 REPO="git@code.springupsoftware.com:cmc/cmc-sales.git"
 BRANCH="stg"
 STAGING_DIR="cmc-sales-staging"
@@ -32,6 +32,7 @@ ssh $SERVER \
   "SERVER=$SERVER REPO='$REPO' BRANCH='$BRANCH' STAGING_DIR='$STAGING_DIR' USE_CACHE='$USE_CACHE' RUN_SYNC='$RUN_SYNC' bash -s" << 'ENDSSH'
   set -e
   echo "Connected to $SERVER."
+  cd /home/cmc
   # Clone or update staging branch
   if [ -d "$STAGING_DIR" ]; then
     echo "Updating existing staging directory $STAGING_DIR..."