add named volume to lnd service for persisting data accross container lifecycle

docker/docker-compose.yml

@@ -9,8 +9,8 @@ services:
       build:
         context: btcd/
       volumes:
-            - shared:/rpc
-            - bitcoin:/data
+        - shared:/rpc
+        - bitcoin:/data
       environment:
         - RPCUSER
         - RPCPASS
@@ -41,8 +41,8 @@ services:
       build:
         context: ltcd/
       volumes:
-            - shared:/rpc
-            - litecoin:/data
+        - shared:/rpc
+        - litecoin:/data
       environment:
         - RPCUSER
         - RPCPASS
@@ -76,7 +76,8 @@ services:
           - CHAIN
           - DEBUG
         volumes:
-            - shared:/rpc
+          - shared:/rpc
+          - lnd:/root/.lnd
         entrypoint: ["./start-lnd.sh"]
 
     lnd_ltc:
@@ -102,6 +103,11 @@ volumes:
   bitcoin:
     driver: local
 
+  # lnd volume is used for persisting lnd application data and chain state
+  # during container lifecycle.
+  lnd:
+    driver: local
+
   # litecoin volume is needed for maintaining blockchain persistence
   # during ltcd container recreation.
   litecoin: