📝 Add .env.sample

.env.sample

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+# Environment variables for Timetable V2 Notify
+# Use this file as a template and change the values accordingly
+
+# Set Timetable V2 API endpoint and token here
+# (Make sure the /api and https:// is included in the endpoint)
+TIMETABLE_ENDPOINT=
+TIMETABLE_TOKEN=
+
+# Set the Matrix url, bot user name and auth token here
+MATRIX_URL=
+MATRIX_USER=
+# You can get the access token by for example logging into
+# the bot's matrix account in element and copying the
+# Access Token under Settings > Help & About > Advanced
+MATRIX_TOKEN=