create intial db, models, websocket and architecture.

internal/db/sqlite.go

@@ -0,0 +1,31 @@
+package db
+
+import (
+	"database/sql"
+	"os"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type DB struct {
+	*sql.DB
+}
+
+func NewDB(path string) (*DB, error) {
+	db, err := sql.Open("sqlite3", path)
+	if err != nil {
+		return nil, err
+	}
+
+	schema, err := os.ReadFile("../../migrations/schema.sql")
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = db.Exec(string(schema))
+	if err != nil {
+		return nil, err
+	}
+
+	return &DB{db}, nil
+}