Your missing some options in that database.js file. This is an example from our documentation for SQLite:
module.exports = ({ env }) => ({
defaultConnection: 'default',
connections: {
default: {
connector: 'bookshelf',
settings: {
client: 'sqlite',
filename: env('DATABASE_FILENAME', '.tmp/data.db'),
},
options: {
useNullAsDefault: true,
},
},
},
});