One solution is to allow the database specification to be overridden
with an environment variable. For example, open
C<lib/MyApp/Model/DB.pm> in your editor and change the
-C<__PACKAGE__-E<gt>config(...> declaration to resemble:
+C<< __PACKAGE__->config(... >> declaration to resemble:
my $dsn = $ENV{MYAPP_DSN} ||= 'dbi:SQLite:myapp.db';
__PACKAGE__->config(