feat: add container for injection

Author: TimNekk

app/container.py

@@ -0,0 +1,20 @@
+from dependency_injector import containers, providers
+
+from app.spotify.service import SpotifyService
+
+
+class Container(containers.DeclarativeContainer):
+    wiring_config = containers.WiringConfiguration(
+        packages=[
+            "app",
+        ]
+    )
+
+    config = providers.Configuration(ini_files=["config.ini"], strict=True)
+
+    spotify_service = providers.Singleton(
+        SpotifyService,
+        client_id=config.spotify.client_id,
+        client_secret=config.spotify.client_secret,
+        redirect_uri=config.spotify.redirect_uri
+    )