Do I follow solid principles by writing this code.? [closed]

Is this code break SOLID principles and bad practice because it has side effect? ?

var app = exports = module.exports = {};
app.prototype = Object.create(expressApp.prototype);

app.config = function config() {
    this.set("trust proxy", true);
    this.use(someMiddleware)
    this.use(json());
}

And I will use it like that

const {app} = require('file')

app.config()

Instead of copying and pasting same code over and over