add helper tooling for vapid push setup

scripts/generate_vapid_keys.py

@@ -0,0 +1,26 @@
+from __future__ import annotations
+
+from py_vapid import Vapid01, b64urlencode
+from cryptography.hazmat.primitives import serialization
+
+
+def main() -> None:
+    vapid = Vapid01()
+    vapid.generate_keys()
+
+    public_key = b64urlencode(
+        vapid.public_key.public_bytes(
+            encoding=serialization.Encoding.X962,
+            format=serialization.PublicFormat.UncompressedPoint,
+        )
+    )
+    private_value = vapid.private_key.private_numbers().private_value
+    private_key = b64urlencode(private_value.to_bytes(32, "big"))
+
+    print(f"NOURI_VAPID_PUBLIC_KEY={public_key}")
+    print(f"NOURI_VAPID_PRIVATE_KEY={private_key}")
+    print("NOURI_VAPID_SUBJECT=mailto:mail@hnz.io")
+
+
+if __name__ == "__main__":
+    main()