feat: add shutdown listener

Signed-off-by: Sphericalkat <amolele@gmail.com>

internal/config/config.go

@@ -0,0 +1,41 @@
+package config
+
+import (
+	"github.com/knadh/koanf/v2"
+	"github.com/knadh/koanf/parsers/dotenv"
+	"github.com/knadh/koanf/providers/env"
+	"github.com/knadh/koanf/providers/file"
+	log "github.com/sirupsen/logrus"
+)
+
+type Config struct {
+	DatabaseURL  string `koanf:"DATABASE_URL"`
+	Port         string `koanf:"PORT"`
+	S3AccessKey  string `koanf:"S3_ACCESS_KEY"`
+	S3SecretKey  string `koanf:"S3_SECRET_KEY"`
+	S3BucketName string `koanf:"S3_BUCKET_NAME"`
+	S3Endpoint   string `koanf:"S3_ENDPOINT"`
+	Env          string `koanf:"ENV"`
+	SecretKey    string `koanf:"SECRET_KEY"`
+}
+
+var Conf *Config
+
+var k = koanf.New(".")
+
+func Load() {
+	if err := k.Load(file.Provider(".env"), dotenv.Parser()); err != nil {
+		log.Infof("unable to find env file: %v", err)
+		log.Info("falling back to env variables")
+	}
+
+	if err := k.Load(env.Provider("", ".", nil), nil); err != nil {
+		log.Fatalf("error loading config: %v", err)
+	}
+
+	Conf = &Config{}
+	err := k.Unmarshal("", Conf)
+	if err != nil {
+		log.Fatalf("error loading config: %v", err)
+	}
+}