ops: Use unix sockets to query esplora from nginx

production/electrs-start-liquidtestnet

@@ -17,7 +17,7 @@ do
 		--db-dir __ELECTRS_DATA_ROOT__ \
 		--network liquidtestnet \
 		--daemon-dir "${HOME}" \
-		--http-addr '[::]:3004' \
+		--http-socket-file '/elements/socket/esplora-liquid-testnet' \
 		--cookie '__ELEMENTS_RPC_USER__:__ELEMENTS_RPC_PASS__' \
 		--precache-scripts "${HOME}/electrs/contrib/popular-scripts.txt"
 	sleep 1