Add Go rewrite with Postgres 17 and Dokploy Docker Compose

Co-authored-by: Cursor <cursoragent@cursor.com>

Go/internal/config/config.go

@@ -0,0 +1,71 @@
+package config
+
+import (
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	Port           string
+	BaseURL        string
+	HTTPBudgetSec  int
+	SessionSecret  string
+	DatabaseURL    string
+	PanelURL       string
+	PanelToken     string
+	ServerLabelsJSON string
+	MigrationsDir  string
+	WebDir         string
+}
+
+func Load() Config {
+	budget := envInt("APP_HTTP_BUDGET_SEC", 52)
+	return Config{
+		Port:             env("APP_PORT", "30000"),
+		BaseURL:          strings.Trim(env("APP_BASE_URL", ""), "/"),
+		HTTPBudgetSec:    budget,
+		SessionSecret:    env("APP_SESSION_SECRET", "dev-insecure-change-me-please-32chars"),
+		DatabaseURL:      env("DATABASE_URL", "postgres://vpn_admin:vpn_admin@127.0.0.1:5432/vpn_admin?sslmode=disable"),
+		PanelURL:         env("AMNEZIA_PANEL_URL", ""),
+		PanelToken:       env("AMNEZIA_API_TOKEN", ""),
+		ServerLabelsJSON: env("AMNEZIA_SERVER_LABELS_JSON", ""),
+		MigrationsDir:    env("MIGRATIONS_DIR", "migrations"),
+		WebDir:           env("WEB_DIR", "web"),
+	}
+}
+
+func (c Config) HTTPBudget() time.Duration {
+	if c.HTTPBudgetSec <= 0 {
+		return 0
+	}
+	return time.Duration(c.HTTPBudgetSec) * time.Second
+}
+
+func (c Config) AppURL(path string) string {
+	path = strings.TrimLeft(path, "/")
+	if c.BaseURL == "" {
+		return "/" + path
+	}
+	return "/" + c.BaseURL + "/" + path
+}
+
+func env(k, def string) string {
+	if v := os.Getenv(k); v != "" {
+		return v
+	}
+	return def
+}
+
+func envInt(k string, def int) int {
+	v := os.Getenv(k)
+	if v == "" {
+		return def
+	}
+	n, err := strconv.Atoi(v)
+	if err != nil {
+		return def
+	}
+	return n
+}