Add your application configuration to your .env file in the root of your project:
S3_BUCKET=YOURS3BUCKET
SECRET_KEY=YOURSECRETKEYGOESHERE
Then in your Go app you can do something like
package main
import (
"log"
"os"
"github.com/goapt/dotenv"
)
func main() {
err := dotenv.Load()
if err != nil {
log.Fatal("Error loading .env file")
}
s3Bucket := os.Getenv("S3_BUCKET")
secretKey := os.Getenv("SECRET_KEY")
// now do something with s3 or whatever
}