docker: update docker instructions to be aware of multi-chain config

docker/README.md

@@ -109,6 +109,9 @@ bob$ lncli getinfo
     "block_hash": "7d0bc86ea4151ed3b5be908ea883d2ac3073263537bcf8ca2dca4bec22e79d50",
     "synced_to_chain": true,
     "testnet": false
+    "chains": [
+        "bitcoin"
+    ]
 }
 
 # Get the IP address of "Bob" node:

docker/lnd/start-lnd.sh

@@ -47,10 +47,11 @@ BITCOIN_NETWORK=$(set_default "$BITCOIN_NETWORK" "simnet")
 lnd \
     --datadir="/data" \
     --logdir="/data" \
-    "--$BITCOIN_NETWORK" \
-    --btcdhost="btcd" \
     --rpccert="/rpc/rpc.cert" \
-    --rpcuser="$RPCUSER" \
-    --rpcpass="$RPCPASS" \
+    --bitcoin.active \
+    "--bitcoin.$BITCOIN_NETWORK" \
+    --bitcoin.rpchost="btcd" \
+    --bitcoin.rpcuser="$RPCUSER" \
+    --bitcoin.rpcpass="$RPCPASS" \
     --debuglevel="$DEBUG" \
     "$@"