feat: use db

internal/db.go

@@ -0,0 +1,18 @@
+package internal
+
+import (
+	"database/sql"
+
+	_ "github.com/lib/pq"
+)
+
+var db *sql.DB
+
+func InitDB(dsn string) error {
+	var err error
+	db, err = sql.Open("postgres", dsn)
+	if err != nil {
+		return err
+	}
+	return db.Ping()
+}