Session 4 complete - RedFlag update management platform

🚩 Private development - version retention only

✅ Complete web dashboard (React + TypeScript + TailwindCSS)
✅ Production-ready server backend (Go + Gin + PostgreSQL)
✅ Linux agent with APT + Docker scanning + local CLI tools
✅ JWT authentication and REST API
✅ Update discovery and approval workflow

🚧 Status: Alpha software - active development
📦 Purpose: Version retention during development
⚠️  Not for public use or deployment

aggregator-server/internal/config/config.go

@@ -0,0 +1,41 @@
+package config
+
+import (
+	"os"
+	"strconv"
+
+	"github.com/joho/godotenv"
+)
+
+// Config holds the application configuration
+type Config struct {
+	ServerPort       string
+	DatabaseURL      string
+	JWTSecret        string
+	CheckInInterval  int
+	OfflineThreshold int
+}
+
+// Load reads configuration from environment variables
+func Load() (*Config, error) {
+	// Load .env file if it exists (for development)
+	_ = godotenv.Load()
+
+	checkInInterval, _ := strconv.Atoi(getEnv("CHECK_IN_INTERVAL", "300"))
+	offlineThreshold, _ := strconv.Atoi(getEnv("OFFLINE_THRESHOLD", "600"))
+
+	return &Config{
+		ServerPort:       getEnv("SERVER_PORT", "8080"),
+		DatabaseURL:      getEnv("DATABASE_URL", "postgres://aggregator:aggregator@localhost:5432/aggregator?sslmode=disable"),
+		JWTSecret:        getEnv("JWT_SECRET", "change-me-in-production"),
+		CheckInInterval:  checkInInterval,
+		OfflineThreshold: offlineThreshold,
+	}, nil
+}
+
+func getEnv(key, defaultValue string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return defaultValue
+}