Update parity config, fix hosts.example file

hosts.example

@@ -21,12 +21,15 @@ node03.example.com
 
 [explorer]
 
+[blockscout]
+
 [poa:children]
 bootnode
 moc
 netstat
 validator
 explorer
+blockscout
 
 [centos]
 node03.example.com

roles/blockscout/templates/node.toml.j2

@@ -3,7 +3,7 @@ chain = "spec.json"
 base_path = "parity_data"
 
 [rpc]
-apis = ["all"]
+apis = ["web3","eth","net", "parity",  "traces"]
 cors=["all"]
 
 [network]
@@ -17,7 +17,7 @@ disable = false
 port = 8546
 interface = "all"
 origins = ["all"]
-apis = ["all"]
+apis = ["web3","eth","net","parity", "pubsub", "traces"]
 hosts = ["all"]
 
 [ui]
@@ -28,4 +28,8 @@ disable_periodic = true
 
 [footprint]
 tracing = "on"
-pruning = "archive"
+pruning = "archive"
+fat_db = "on"
+
+[misc]
+log_file = "{{ home }}/parity.log"