Use FastAPI instead of Django

app/cli.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import click
+from reader import Reader, UpdateError
+
+from app.dependencies import get_reader
+
+if TYPE_CHECKING:
+    from reader import UpdatedFeed
+
+
+@click.command()
+def update_feeds() -> None:
+    """Update all the feeds."""
+    click.echo("Updating feeds...")
+    reader: Reader = get_reader()
+    for feed in reader.update_feeds_iter():
+        value: UpdatedFeed | None | UpdateError = feed.value
+        if value is not None and isinstance(value, UpdateError):
+            click.echo(f"Error updating {feed.url}: {value}")
+        else:
+            click.echo(f"Updated {feed.url}.")
+    click.echo("Feeds updated.")
+
+
+if __name__ == "__main__":
+    update_feeds()