RSS → ntfy bridge with modern web UI

Features: feed CRUD, per-feed ntfy target (incl. private servers),
Telegram/webhook channels, keyword filters, image attachments,
per-feed intervals, OPML import/export, notification history & stats,
users with roles, admin alerts, RU/EN i18n, light/dark theme,
notification preview, history search, activity chart. Dockerized.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.env.example

@@ -0,0 +1,17 @@
+# Copy to .env and adjust. All values are optional — sane defaults apply.
+
+# Default ntfy server used by feeds that don't specify their own.
+DEFAULT_NTFY_SERVER=https://ntfy.sh
+
+# How often (minutes) feeds are polled. Editable later in the UI.
+DEFAULT_CHECK_INTERVAL=5
+
+# Bootstrap admin account — used ONLY when the database is first created.
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=admin
+
+# Cookie signing secret. Leave empty to auto-generate & persist in DATA_DIR.
+# SECRET_KEY=
+
+# Where the SQLite DB and secret key are stored.
+DATA_DIR=./data