update keymap and sample config

README.md

@@ -41,6 +41,7 @@ $ cargo install --version 0.1.0-alpha.1 gobang
 | <kbd>→</kbd> | Move focus to right |
 | <kbd>←</kbd> | Move focus to left |
 | <kbd>/</kbd> | Filter |
+| <kbd>1</kbd>, <kbd>2</kbd>, <kbd>3</kbd>, <kbd>4</kbd>, <kbd>5</kbd> | Switch to records, columns, constraints, foreign keys, indexes tab |
 
 ## Configuration
 
@@ -65,4 +66,15 @@ user = "root"
 host = "localhost"
 port = 3306
 database = "foo"
+
+[[conn]]
+type = "postgres"
+user = "root"
+host = "localhost"
+port = 5432
+database = "bar"
+
+[[conn]]
+type = "sqlite"
+path = "/path/to/baz.db"
 ```