🚀 Add feature: Frontend app working stub

🚀 Add feature: Ruff linting
🚀 Add feature: Logging

backend/app/config.py

@@ -0,0 +1,15 @@
+import logging
+
+from app.models import AvailableSource, AvailableSourcesResponse
+
+logger = logging.getLogger("base_logger")
+
+available_sources = AvailableSourcesResponse(
+    sources=[
+        AvailableSource(
+            display_name="LinkedIn Shares",
+            name="linkedin_shares",
+            format="csv",
+        ),
+    ],
+)