🚀 Dash - Homelab Dashboard

A clean, customizable homelab dashboard inspired by CasaOS.

Features:
- Empty-first dashboard (no demo data)
- 3 themes: Light, Dark, CasaOS glassmorphism
- Widgets: Clock (multi-timezone), Pi-hole, Memos, Immich, Image
- Drag & drop app organization
- Grid + list view for apps
- Groups with collapse/expand
- Proper widget refresh handling
- Visual timezone picker
- Square app cards with hover effects

Stack: Go + Gin + PostgreSQL + Next.js 15 + React 19 + Tailwind CSS + shadcn/ui

backend/internal/config/config.go

@@ -0,0 +1,98 @@
+package config
+
+import (
+	"errors"
+	"fmt"
+	"net/url"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	AppEnv             string
+	HTTPAddr           string
+	DatabaseURL        string
+	DataDir            string
+	PublicBaseURL      string
+	WidgetFetchTimeout time.Duration
+	WidgetCacheTTL     time.Duration
+	MaxIconUploadBytes int64
+	AllowedOrigins     []string
+	MigrationsDir      string
+}
+
+func Load() (Config, error) {
+	cfg := Config{
+		AppEnv:             env("APP_ENV", "development"),
+		HTTPAddr:           env("HTTP_ADDR", ":8080"),
+		DatabaseURL:        env("DATABASE_URL", ""),
+		DataDir:            env("DATA_DIR", "./data"),
+		PublicBaseURL:      env("PUBLIC_BASE_URL", "http://localhost:8080"),
+		WidgetFetchTimeout: 5 * time.Second,
+		WidgetCacheTTL:     60 * time.Second,
+		MaxIconUploadBytes: 524288,
+		AllowedOrigins:     splitCSV(env("ALLOWED_ORIGINS", "http://localhost:3000")),
+		MigrationsDir:      env("MIGRATIONS_DIR", "../db/migrations"),
+	}
+
+	var err error
+	if raw := os.Getenv("WIDGET_FETCH_TIMEOUT"); raw != "" {
+		cfg.WidgetFetchTimeout, err = time.ParseDuration(raw)
+		if err != nil {
+			return Config{}, fmt.Errorf("WIDGET_FETCH_TIMEOUT: %w", err)
+		}
+	}
+	if raw := os.Getenv("WIDGET_CACHE_TTL"); raw != "" {
+		cfg.WidgetCacheTTL, err = time.ParseDuration(raw)
+		if err != nil {
+			return Config{}, fmt.Errorf("WIDGET_CACHE_TTL: %w", err)
+		}
+	}
+	if raw := os.Getenv("MAX_ICON_UPLOAD_BYTES"); raw != "" {
+		cfg.MaxIconUploadBytes, err = strconv.ParseInt(raw, 10, 64)
+		if err != nil {
+			return Config{}, fmt.Errorf("MAX_ICON_UPLOAD_BYTES: %w", err)
+		}
+	}
+	if cfg.DatabaseURL == "" {
+		return Config{}, errors.New("DATABASE_URL is required")
+	}
+	if cfg.MaxIconUploadBytes <= 0 {
+		return Config{}, errors.New("MAX_ICON_UPLOAD_BYTES must be positive")
+	}
+	if cfg.WidgetFetchTimeout <= 0 {
+		return Config{}, errors.New("WIDGET_FETCH_TIMEOUT must be positive")
+	}
+	if cfg.WidgetCacheTTL <= 0 {
+		return Config{}, errors.New("WIDGET_CACHE_TTL must be positive")
+	}
+	if _, err := url.ParseRequestURI(cfg.PublicBaseURL); err != nil {
+		return Config{}, fmt.Errorf("PUBLIC_BASE_URL must be absolute URL: %w", err)
+	}
+	return cfg, nil
+}
+
+func (c Config) IconDir() string {
+	return strings.TrimRight(c.DataDir, "/") + "/icons"
+}
+
+func env(key, fallback string) string {
+	if value := os.Getenv(key); value != "" {
+		return value
+	}
+	return fallback
+}
+
+func splitCSV(raw string) []string {
+	parts := strings.Split(raw, ",")
+	out := make([]string, 0, len(parts))
+	for _, part := range parts {
+		part = strings.TrimSpace(part)
+		if part != "" {
+			out = append(out, part)
+		}
+	}
+	return out
+}