How Can I Securely Use AWS Credentials in Docker for My FastAPI App?

When deploying to EC2, make sure you're using the right commands. If you're using `docker run` or Docker Compose, remember that Docker won't automatically use the .env file unless you specify it with the `--env-file` option for `docker run`, or declare `env_file` in your Docker Compose file. And yes, it's crucial to never commit your .env files to version control for security!

For AWS deployments, consider assigning the correct IAM role to your application. AWS automatically provides temporary credentials for the lifespan of your instance. This way, your application can authenticate without needing explicit AWS keys in your Docker container.

One effective way to handle AWS credentials is by using an IAM instance role. Attach a role to your EC2 instance and then your application can authenticate without needing hard-coded keys. If you're not up for that, at least ensure the container accepts your keys as environment variables directly.

Avoid embedding secrets directly into your application at build time. Instead, you can create environment variables at runtime, either by using the `--env-file` option or by leveraging Docker secrets for better management of your sensitive data. This is a common mistake many developers make, so you're not alone!