WIP: building database in knex.js

db/knex_migrations/README.md

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+## Info
+
+https://knexjs.org/guide/migrations.html#knexfile-in-other-languages
+
+
+## Template
+
+Filename: YYYYMMDDHHMMSS_name.js
+
+```js
+exports.up = function(knex) {
+
+};
+
+exports.down = function(knex) {
+
+};
+
+// exports.config = { transaction: false };
+```
+
+## Example
+
+20230211120000_create_users_products.js
+
+```js
+exports.up = function(knex) {
+  return knex.schema
+    .createTable('users', function (table) {
+        table.increments('id');
+        table.string('first_name', 255).notNullable();
+        table.string('last_name', 255).notNullable();
+    })
+    .createTable('products', function (table) {
+        table.increments('id');
+        table.decimal('price').notNullable();
+        table.string('name', 1000).notNullable();
+    });
+};
+
+exports.down = function(knex) {
+  return knex.schema
+      .dropTable("products")
+      .dropTable("users");
+};
+```