added frontend and made it usable

backend/config/config.go

@@ -0,0 +1,32 @@
+package config
+
+import (
+	"log"
+	"os"
+
+	"github.com/joho/godotenv"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+func LoadEnv() {
+	if err := godotenv.Load(); err != nil {
+		log.Println("Keine .env Datei gefunden")
+	}
+}
+
+func GetEnv(key string, fallback string) string {
+	if value := os.Getenv(key); len(value) != 0 {
+		return value
+	}
+	return fallback
+}
+
+func ConnectDatabase() *gorm.DB {
+	dsn := GetEnv("DATABASE_URL", "")
+	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
+	if err != nil {
+		log.Fatal("Fehler beim Verbinden der DB:", err)
+	}
+	return db
+}