(feat) change directory structure and add test cases

app/main.py

@@ -0,0 +1,37 @@
+from fastapi import FastAPI, HTTPException, BackgroundTasks
+from .base_types import Notification, NotificationType
+import logging
+
+app = FastAPI(
+    title="Cloud Accelerator Coding Challenge",
+    description="Simple Notification App for the Coding Challenge.",
+    version="0.0.1",
+    terms_of_service="TOS",
+    contact={
+        "name": "Nicolas Sebastian Schuler",
+        "url": "https://n-schuler.dev",
+        "email": "mail@n-schuler.dev",
+    },
+    license_info={"name": "MIT", "identifier": "MIT"},
+)
+
+
+def log_notification(ntfy: Notification):
+    """Log Notification."""
+    logging.warning(ntfy)
+
+
+@app.post("/notification", status_code=204)
+async def notification(ntfy: Notification, background_tasks: BackgroundTasks):
+    """Forward Notification
+
+    * Forwards Notification if `Type: Warning`.
+    """
+    match ntfy.Type:
+        case NotificationType.INFO:
+            pass
+        case NotificationType.WARNING:
+            background_tasks.add_task(log_notification, ntfy)
+        case _:
+            # Already catched by Pydantic
+            raise HTTPException(status_code=400, detail="Malformed Request Body")