ADD: added basic backend function plus a mockup for a cli interface

backend/internal/config/config.go

@@ -0,0 +1,48 @@
+package config
+
+import (
+	"os"
+)
+
+type Config struct {
+	Port             string
+	Env              string
+	DatabaseDriver   string
+	DatabaseHost     string
+	DatabasePort     string
+	DatabaseName     string
+	DatabaseUser     string
+	DatabasePassword string
+	FrontendURL      string
+}
+
+func New() *Config {
+
+	return generateConfig()
+}
+
+func generateConfig() *Config {
+
+	cfg := Config{
+		Port:             getEnv("PORT", "8080"),
+		DatabaseDriver:   getEnv("DB_DRIVER", "postgres"),
+		DatabaseHost:     getEnv("database", "localhost"),
+		DatabasePort:     getEnv("DB_PORT", "5432"),
+		DatabaseName:     getEnv("DB_NAME", "studia"),
+		DatabaseUser:     getEnv("DB_USER", "user"),
+		DatabasePassword: getEnv("DB_PASSWORD", "password"),
+		Env:              getEnv("ENV", "development"),
+		FrontendURL:      getEnv("FRONTEND_URL", "http://localhost:5173"),
+	}
+
+	return &cfg
+}
+
+// helper function to get env var or default
+func getEnv(key, defaultVal string) string {
+	value, exists := os.LookupEnv(key)
+	if !exists || value == "" {
+		return defaultVal
+	}
+	return value
+}