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Nest Database Module (Type ORM) with environment variables support

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Aackuser
Last edited Jun 5, 2018
Created on Feb 3, 2020

This example shows a NestJS DatabaseModule that dynamically configures TypeORM using environment-specific variables loaded through a custom EnvService. The EnvService reads a `.env` file via `dotenv.parse` and `fs.readFileSync`, casting values like `DB_PORT` with `parseInt` and converting `APP_DEBUG` to a boolean. The module uses `TypeOrmModule.forRoot` with settings from `config.DB_TYPE`, `config.DB_HOST`, and other properties, while `EnvModule` provides the service globally. The code defines an `EnvData` interface and includes a sample environment template.

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