I learned from a friend to use Zod to check for process.env. I refined it a bit and got:

```

const EnvSchema = z.object({

  NODE_ENV: z.enum(['development', 'production', 'staging']),

  DATABASE_URL: z.string(),

  POSTHOG_KEY: z.string(),

export type AlertDownEnv = z.infer<typeof EnvSchema>;

export function getEnvironments(env: Record<string, string>): AlertDownEnv { return EnvSchema.parse(env); }

```

Then you can:

```

const env = getEnvironments(process.env);

```

`env` will be fully typed!

Definitely, I need to do some improvements in my frontend logic!