➕ Add README

Author: gy-mate

README.md

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+# GTFS Feeds
+
+This repository contains the following GTFS Schedule feeds maintained by me.
+
+## List
+
+### Hungary
+
+#### Funicular
+
+[`hu_funicular`](hu_funicular)
+
+## Deployment
+
+On pushes to `main`, all changed feeds are zipped and uploaded to my public [AWS S3 bucket](s3://gtfs-gy-mate/). See their HTTPS permalinks at [gy-mate.hu/gtfs](https://gy-mate.hu/gtfs).