update contributing and readme

CONTRIBUTING.md

@@ -17,7 +17,7 @@ As of now, publishing fees have been paid by the maintainer.
 NOTE: A quick discussion upfront can highlight any potential issues, streamline
 the merge process, and ensure you're on the right track to avoid rework.
 
-TIP: Look for issues with `ready` label to get contributing immediately
+TIP: Look for issues with `ready` label to get started without any friction
 
 1. Fork the repository
 2. Pick an issue. If the fix/feature you're gonna work doesn't have an issue,
@@ -39,6 +39,8 @@ implementing a new feature
 * Any new dependency must support the all the platforms except for Web
 * It is not necessary to change the version unless you're in charge of
 publishing a release
+* Update [CHANGELOG.md](./CHANGELOG.md) with your change description. (Use
+version name `Next`)
 
 ## Translating
 

README.md

@@ -34,6 +34,16 @@ Feedbacks and ideas are greatly appreciated 🌟
 
 Flow in production: [Blog post](https://blog.gege.mn/publishing-flow-to-production-20250104?showSharer=true)
 
+## Support Flow
+
+Flow is a personal project developed during my free time, and it generates no
+income.  Maintaining Flow on the App Store requires a substantial annual fee
+(see [Apple Developer Program](https://developer.apple.com/support/enrollment/#:~:text=The%20Apple%20Developer%20Program%20annual,in%20local%20currency%20where%20available.)),
+which [I currently cover](https://github.com/sadespresso).  To ensure Flow's
+continued existence and future development, your support is greatly appreciated.
+
+[Buy me a coffee](https://buymeacoffee.com/sadespresso)
+
 ## Supported platforms
 
 * Android
@@ -82,3 +92,21 @@ to enhance the UI for desktop experience for now.
 [^2]: Please double-check from the official website, may be outdated. Visit
 <https://docs.objectbox.io/getting-started#add-objectbox-to-your-project>
 (make sure to choose Flutter to see the script).
+
+### Build artifacts
+
+Flow's build logs are freely available for anyone examine.
+
+#### Android
+
+GitHub Actions script is used to build both Fat-APK (multi-architecture), and
+appbundles (for Google Play).
+
+* Build scripts: <https://github.com/flow-mn/flow/tree/main/.github/workflows>
+* Build logs: <https://github.com/flow-mn/flow/actions>
+
+#### iOS
+
+Due to my skill issues, I couldn't manage to build archives through GitHub
+Actions. Currently, [Codemagic](https://codemagic.io) is used to build the
+iOS releases.