fix README config example

we now support network based SQL and 'file' make little sense in
postgres/mysql, changing that to 'database' makes it reusable for both
use cases.

1 files changed, 1 insertions, 1 deletions

diff --git a/README.md b/README.md
index b797006..2a92a4d 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ source:
   default: sql
   sql:
     adapter: sqlite
-    file: "/usr/local/lan/corona.db"
+    database: "/usr/local/lan/corona.db"
     table: device
     map:
       name: ptr