Change database from sqlite postgres

change the ./config/database.js file


module.exports = ({ env }) => ({
  connection: {
    client: 'postgres',
    connection: {
      host: env('DATABASE_HOST', 'localhost'),
      port: env.int('DATABASE_PORT', 5432),
      database: env('DATABASE_NAME', 'database_name'),
      user: env('DATABASE_USERNAME', 'user'),
      password: env('DATABASE_PASSWORD', 'password'),
      ssl: env.bool('DATABASE_SSL', false),
    },
  },
});

Then restart the server.
You may need to install pg or create the database manually.