Changing redis addr in example to match compose file

src/settings.toml.example

@@ -1,7 +1,7 @@
 [bimng]
 bindaddr = "0.0.0.0"
 bindport = 8080
-redisaddr = "redis://127.0.0.1:6379"
+redisaddr = "redis://redis:6379"
 
 [ldap]
 hostname = "example.com"