Set up data paths within the snaps

snap/snapcraft.yaml

@@ -16,6 +16,8 @@ apps:
     command: bin/rove
     plugs: 
       - network
+    environment:
+      USER_DATA: $SNAP_USER_DATA
   rove-server:
     command: bin/rove-server
     plugs:
@@ -23,16 +25,21 @@ apps:
       - network-bind
     environment:
       WORDS_FILE : "$SNAP/data/words_alpha.txt"
+      DATA_PATH : $SNAP_USER_DATA
   rove-accountant:
     command: bin/rove-accountant
     plugs:
       - network
       - network-bind
+    environment:
+      DATA_PATH : $SNAP_USER_DATA
   rove-rest-server:
     command: bin/rove-reverse-proxy
     plugs:
       - network
       - network-bind
+    environment:
+      DATA_PATH : $SNAP_USER_DATA
 
 parts:
   go-rove: