Added to docker-compose var with path to socket

Added to docker-compose.yml variable with path to socket, so we can now run:

`docker exec -ti cardano-node-iog_cardano-node_1 /usr/local/bin/cardano-cli query tip --testnet-magic 1097911063`

docker-compose.yml

@@ -5,6 +5,7 @@ services:
     image: inputoutput/cardano-node:${CARDANO_NODE_VERSION:-1.34.1}
     environment:
       - NETWORK=${NETWORK:-mainnet}
+      - CARDANO_NODE_SOCKET_PATH=${CARDANO_NODE_SOCKET_PATH:-/ipc/node.socket}
     volumes:
       - node-db:/data/db
       - node-ipc:/ipc