supernote/README.md

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+# Supernote Private Cloud
+
+Copied from Supernote's official
+[docker-compose.yml](https://supernote-private-cloud.supernote.com/cloud/docker-compose.yml),
+with these changes:
+
+- **Database init scripts are mounted.** The official file doesn't mount
+  anything into `docker-entrypoint-initdb.d`, so `supernotedb.sql` never
+  loads into a new database. This file mounts:
+  - `supernotedb.sql` → `00-supernotedb.sql` (the schema)
+  - `supernote-email-init.sql` → `01-supernote-email-init.sql`
+- **SMTP settings are pre-loaded.** `supernote-email-init.sql` fills in
+  `u_email_config`. Registration and password-reset emails then work without
+  a manual trip to the web UI's "Email Settings" dialog.
+- **Database and Redis settings are inline.** The official file loads
+  `supernote-service`'s `DB_HOSTNAME`, `MYSQL_*` and `REDIS_*` variables from
+  a separate `.dbenv` file. Here they're set directly in the compose file,
+  from the same `.env` that mariadb and redis use.
+
+## Notes
+
+- **Init scripts only run once.** They run only against an empty
+  `sndata/db_data`. The playbook re-applies the SMTP settings with
+  `docker compose exec` on every run, so changing them in Infisical still
+  takes effect.
+- **Image versions are pinned** (`mariadb:10.6.24`, `redis:7.4.7`,
+  `notelib:6.9.3`, `supernote-service:26.06.04`). To upgrade, change the tags
+  here and push to `stable`.
+- **Check Supernote's file when upgrading.** Compare against the official
+  file in case they've added services or variables.