feat: initialize flask app skeleton

app/__init__.py

@@ -0,0 +1,16 @@
+from flask import Flask
+
+
+def create_app(config_object=None):
+    app = Flask(__name__)
+
+    if config_object:
+        if isinstance(config_object, dict):
+            app.config.update(config_object)
+        else:
+            app.config.from_object(config_object)
+
+    from app.api.health import bp as health_bp
+
+    app.register_blueprint(health_bp)
+    return app