commentarly like changelog update

CHANGELOG.md

@@ -5,12 +5,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
-## [0.2.0] - 2024-03-31
+## [0.4.0] - 2024-03-31
 ### Added
 - Different times for users to receive notifications
 - Ping endpoint
 ### Changed
 - Notification loop runs every 5 minutes.
+- DB changes:
+  - `alter table subscription add column notify_time varchar(5);`
+  - `update subscription set notify_time = '13:13';`
+  - `create table settings (id integer primary key, prev_notify_end_time varchar(29) not null, running_notify_end_time varchar(29));`
+  - `insert into settings (id, prev_notify_end_time) values (0, '2024-01-01');`
 
 
 ## [0.1.0]

app.py

@@ -1,7 +1,8 @@
 """
 Environment variables:
-- SQLALCHEMY_DATABASE_URI: path to sqlite file, starting with "sqlite:////"
 - ADMIN_PASSWORD: password for admin user for sensitive endpoints, defaults to 'admin'
+- PUSH_SERVER_VERSION: optional version of server
+- SQLALCHEMY_DATABASE_URI: path to sqlite file, starting with "sqlite:////"
 """
 
 from cryptography.hazmat.backends import default_backend