snap: Add federation configuration option

snap/hooks/configure

@@ -16,4 +16,10 @@ then
 with 'snap restart conduit'"
 fi
 
+federation_enabled=$(snapctl get federation)
+if [ -n ${federation_enabled} -a \( "${federation_enabled}" != "true" -a "${federation_enabled}" != "false" \) ]
+then
+    echo "Invalid 'federation' setting: ${federation_enabled}. Valid values are 'true' or 'false'"
+fi
+
 exit 0

snap/local/set-environment

@@ -16,6 +16,12 @@ then
     export ROCKET_PORT="$(snapctl get listen.port)"
 fi
 
+federation_enabled="$(snapctl get federation)"
+if [ -n "${federation_enabled}" ]
+then
+    export ROCKET_FEDERATION_ENABLED=${federation_enabled}
+fi
+
 export ROCKET_ENV="production"
 export ROCKET_DATABASE_PATH=${SNAP_DATA}