message: [docker] Pass through --safety-rules-addr in validator image
  The base template isn't working anymore, allow this to be passed in
  explicitly.
  Closes:
  Approved by: davidiw
diff: @@ -29,6 +29,9 @@ fi
  if [ -n "${CFG_SEED_PEER_IP}" ]; then # Seed peer ip for discovery
  params+="--bootstrap /ip4/${CFG_SEED_PEER_IP}/tcp/6180 "
  fi
  +if [ -n "${CFG_SAFETY_RULES_ADDR}" ]; then
  + params+="--safety-rules-addr ${CFG_SAFETY_RULES_ADDR} "
  +fi
  /opt/libra/bin/config-builder validator \
  --data-dir /opt/libra/data/common \
  