Updated config-for-docker.ini

- added state_snapshot plugin (adds feature without any extra cost)
- bumped up block after which transaction status are tracked
- tuned down webserver-thread-pool-size to 32, which is default

contrib/config-for-docker.ini

@@ -21,6 +21,8 @@ plugin = transaction_status_api
 
 plugin = block_api network_broadcast_api rc_api
 
+plugin = state_snapshot
+
 account-history-rocksdb-path = "blockchain/account-history-rocksdb-storage"
 
 shared-file-size = 24G
@@ -42,9 +44,7 @@ flush-state-interval = 0
 p2p-endpoint = 0.0.0.0:2001
 
 transaction-status-block-depth = 64000
-transaction-status-track-after-block = 47000000
+transaction-status-track-after-block = 53000000
 
 webserver-http-endpoint = 0.0.0.0:8091
 webserver-ws-endpoint = 0.0.0.0:8090
-
-webserver-thread-pool-size = 32