update nethermind container image

Author: cbermudez97

ansible/inventories/devnet-2/host_vars/lighthouse-nethermind-1.yaml

@@ -1,5 +1,5 @@
 # ethereum_node_cl_beacon_endpoint: "https://{{ secret_nginx_shared_basic_auth.name }}:{{ secret_nginx_shared_basic_auth.password }}@bn.bootnode-1.{{ network_subdomain }}"
-nethermind_container_image: "nethermindeth/nethermind:performancediag"
+nethermind_container_image: "nethermindeth/nethermind:simpleflat"
 nethermind_container_command_extra_args:
   - --Init.ChainSpecPath=/network-config/chainspec.json
   - --config=mainnet.cfg
@@ -21,5 +21,8 @@ nethermind_container_command_extra_args:
   - --Sync.PivotNumber=23447683
   - --Sync.PivotTotalDifficulty=58750003716598352816469
   - --Init.NetworkId={{ shadowfork_network_id }}
+  # Flat DB flags
+  - --FlatDb.Enabled=true
+  - --FlatDb.ImportFromPruningTrieState=true
 
 # ethereum_node_cl_beacon_endpoint: "https://{{ secret_nginx_shared_basic_auth.name }}:{{ secret_nginx_shared_basic_auth.password }}@bn.bootnode-1.{{ network_subdomain }}"