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!