CHANGELOG: Add version 0.4.0

Ammend: Added notes about dropped wallet feature:
#40

CHANGELOG.md

@@ -7,6 +7,38 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+## [0.4.0] - 2021-04-25
+
+> This release contains backward incompatible changes to the config.yaml. Please transfer your API keys to a new copy of the config-example.yaml file when updating.
+
+### Added
+
+- (Optional) Daily summary notification with health status. The [README](./README.md) contains an example.
+- (Recommended) Remote endpoint to monitor that `chiadog` is alive. Provides double redundancy in case of a crash,
+  network failure or computer shutdown / reboot. For more information, refer to
+  the [Advanced Usage](./README.md#advanced-usage) section.
+- (Optional) Discord notifications (thanks [@kilbot](https://github.com/kilbot))
+- (Optional) SMTP / Email notifications (thanks [@mikehw](https://github.com/mikehw))
+- (Optional) Slack notifications (thanks [@Starttoaster](https://github.com/Starttoaster))
+- Developers: There's now a [component diagram](./docs/architecture.png) to make auditing
+  and [contributions](./CONTRIBUTING.md) easier.
+
+### Changed
+
+- The absolute number of skipped signage points is now calculated and reported.
+- No more notifications about skipping individual signage points. They'll still appear in the logs and in the daily
+  summary. If multiple SP skips are observed within 60 minutes, you'll still get a notification. This should decrease
+  the unnecessary notifications.
+- Notifications for found proofs are not sent anymore. These *were* going to be replaced by configurable notifications
+  for received coins by the wallet because found proofs != farmed blocks and rewards. Unfortunately, this
+  feature [had to be dropped](https://github.com/martomi/chiadog/pull/40) last minute because it relies on a log which
+  got removed from the most recent Chia releases. You'll still get the number of found proofs in the daily summary
+  notification. Perhaps next release will be parsing out the "Farmed" logs.
+
+### Fixed
+
+- Handling a previously uncaught exception for network requests which could cause `chiadog` to crash.
+
 ## [0.3.0] - 2021-04-13
 
 ### Added
@@ -49,7 +81,9 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 - Adds basic condition checks for harvester operations.
 - Adds integration for Pushover (mobile notifications).
 
-[Unreleased]: https://github.com/martomi/chiadog/compare/v0.3.0...dev
+[Unreleased]: https://github.com/martomi/chiadog/compare/v0.4.0...dev
+
+[0.4.0]: https://github.com/martomi/chiadog/releases/tag/v0.4.0
 
 [0.3.0]: https://github.com/martomi/chiadog/releases/tag/v0.3.0