func establishConnection() {
    var dbHost = URL(string: "localhost")!
    if let requestedHost = ProcessInfo.processInfo.environment["DATABASE_URL"] {
        print("The DATABASE_URL was found. It is \(requestedHost)")
        let urlComp = URLComponents(string: requestedHost)
        urlComp?.scheme = "Postgres"
        if let url = urlComp?.url {
            dbHost = URL(string: requestedHost)!
        }
    }

    let databaseName = "myFirstDatabase"
    let userName = "root"
    let password = "admin"
    let pool = PostgreSQLConnection.createPool(host: dbHost.absoluteString, port: 5432, options: [.databaseName(databaseName), .userName(userName), .password(password)], poolOptions: ConnectionPoolOptions(initialCapacity: 10, maxCapacity: 50))
    Database.default = Database(pool)
}