Add Go WireGuard panel with PostgreSQL 17 and Dokploy compose.

internal/db/db.go

@@ -0,0 +1,45 @@
+package db
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+func Connect(ctx context.Context, databaseURL string) (*pgxpool.Pool, error) {
+	cfg, err := pgxpool.ParseConfig(databaseURL)
+	if err != nil {
+		return nil, fmt.Errorf("parse database url: %w", err)
+	}
+	cfg.MaxConns = 20
+	cfg.MinConns = 2
+	cfg.MaxConnLifetime = time.Hour
+
+	pool, err := pgxpool.NewWithConfig(ctx, cfg)
+	if err != nil {
+		return nil, fmt.Errorf("connect: %w", err)
+	}
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, fmt.Errorf("ping: %w", err)
+	}
+	return pool, nil
+}
+
+func Migrate(ctx context.Context, pool *pgxpool.Pool, migrationsDir string) error {
+	path := filepath.Join(migrationsDir, "001_schema.sql")
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return fmt.Errorf("read migration %s: %w", path, err)
+	}
+	if _, err := pool.Exec(ctx, string(data)); err != nil {
+		return fmt.Errorf("apply schema: %w", err)
+	}
+	log.Println("database schema applied")
+	return nil
+}