AdonisJs: create migration for existent database schema - adonis.js

Question

I have an existent Postgresql database schema which I wrote in SQL. It initializes extensions, enum types, and defines many tables with foreign keys, constraints, indexes, etc.
Now I wish to build an AdonisJs app around that database. I would like new developers to be able to set up an empty database with the same schema, without having to run the SQL command in psql themselves.
I do not want to write all the schema using the Adonis schema builder DSL because there are many tables and it would take a lot of time to translate.
In ruby on Rails, the schema would be kept updated in the db/schema.rb file and new developers would spin up their dev environment using rails db:schema:load. What is the equivalent in AdonisJS?
The current way I'm doing it is by creating a migration that basically runs the raw SQL query. But I'm convinced there should be a cleaner way. Or even a way to get this SQL file away from my migration.
import Database from '#ioc:Adonis/Lucid/Database'
import BaseSchema from '#ioc:Adonis/Lucid/Schema'
export default class extends BaseSchema {
public async up () {
const schemaSql = this.initialSchema()
console.log(schemaSql)
await Database.rawQuery(schemaSql)
}
public async down () {
}
public initialSchema() {
const fs = require('fs');
const path = require('path');
var data = fs.readFileSync(path.resolve(__dirname, './../initial_schema.sql'));
return data.toString();
}
}
and then inside database/initial_schema.sql I have:
CREATE EXTENSION IF NOT EXISTS citext;
CREATE EXTENSION IF NOT EXISTS pgcrypto;
CREATE EXTENSION IF NOT EXISTS btree_gist;
DROP TYPE IF EXISTS nivel_formacion;
CREATE TYPE nivel_formacion AS ENUM ('secundaria', 'grado', 'maestria', 'doctorado');
CREATE TABLE "foobar" (
"id" uuid PRIMARY KEY DEFAULT gen_random_uuid(),
"name" varchar NOT NULL,
"created_at" timestamp NOT NULL,
"updated_at" timestamp NOT NULL
);
-- ...etc etc etc..