use sequence number envvar to overwrite

Author: geohacker

images/tiler-imposm/start.sh

@@ -93,7 +93,7 @@ function updateData(){
     else 
         # OverWrite the last.state.txt file with REPLICATION_URL and sequenceNumber=0
         echo "timestamp=0001-01-01T00\:00\:00Z 
-        sequenceNumber=0
+        sequenceNumber=$SEQUENCE_NUMBER
         replicationUrl=$REPLICATION_URL" > $diffdir/last.state.txt
     fi