docs: update instructions for importing database driver in amigo main…

… file

docs/docs/02-quick-start/03-running-your-first-migration.md

@@ -2,7 +2,35 @@
 
 Since you have initialized mig, you can now run your first migration.
 
-Before that make sure to import the driver that amigo have added in the imports of the main file in `.amigo/main.go`.
+Before that make sure to import the driver that amigo have added in the imports of the main file in `migrations/db/main.go`.
+
+Here is an example of amigo main: 
+
+```go
+package main
+
+import (
+	"database/sql"
+	migrations "github.com/alexisvisco/gwt/migrations"
+	"github.com/alexisvisco/amigo/pkg/entrypoint"
+	"github.com/alexisvisco/amigo/pkg/utils/events"
+	"github.com/alexisvisco/amigo/pkg/utils/logger"
+	_ "github.com/jackc/pgx/v5/stdlib" // <- you can switch to any driver that support the database/sql package
+	"os"
+)
+
+func main() {
+	opts, arg := entrypoint.AmigoContextFromFlags()
+
+	db, err := sql.Open("pgx", opts.GetRealDSN()) // <- change this line too, the dsn is what you provided in the parameter or context configuration
+	if err != nil {
+		logger.Error(events.MessageEvent{Message: err.Error()})
+		os.Exit(1)
+	}
+
+	entrypoint.Main(db, arg, migrations.Migrations, opts)
+}
+```
 
 By default for postgres it imports `github.com/jackc/pgx/v5/stdlib` but you can change it and it will works.