Update paths to reflect our recommended setups

docs/upgrading/index.rst

@@ -83,15 +83,16 @@ keeping a backup of the old version in ``./postgres-old``:
     # Replace "9.4" and "11" with the versions you are migrating between.
     export OLD_POSTGRES=9.4
     export NEW_POSTGRES=11
+    docker-compose stop postgres
     docker run --rm \
-      -v `pwd`/postgres:/var/lib/postgresql/${OLD_POSTGRES}/data \
-      -v `pwd`/postgres-new:/var/lib/postgresql/${NEW_POSTGRES}/data \
+      -v `pwd`/data/postgres:/var/lib/postgresql/${OLD_POSTGRES}/data \
+      -v `pwd`/data/postgres-new:/var/lib/postgresql/${NEW_POSTGRES}/data \
       tianon/postgres-upgrade:${OLD_POSTGRES}-to-${NEW_POSTGRES}
     # Add back the access control rule that doesn't survive the upgrade
     echo "host all all all trust" | sudo tee -a ./postgres-new/pg_hba.conf
     # Swap over to the new database
-    mv ./postgres ./postgres-old
-    mv ./postgres-new ./postgres
+    mv ./data/postgres ./data/postgres-old
+    mv ./data/postgres-new ./data/postgres
 
 
 Non-docker setup