Add Codespaces badge (#4867)

Follow-up of https://github.com/FreshRSS/FreshRSS/pull/4860 , https://github.com/FreshRSS/FreshRSS/pull/4859
Discussion https://github.com/FreshRSS/FreshRSS/discussions/4861

With slight rework of some elements of the readme around

1 files changed, 16 insertions, 12 deletions

diff --git a/README.md b/README.md
index 526e0bb6f..a2ec62248 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 # FreshRSS
 
-FreshRSS is a self-hosted RSS feed aggregator like [Leed](https://github.com/LeedRSS/Leed) or [Kriss Feed](https://tontof.net/kriss/feed/).
+FreshRSS is a self-hosted RSS feed aggregator.
 
 It is lightweight, easy to work with, powerful, and customizable.
 
@@ -19,21 +19,29 @@ FreshRSS natively supports basic Web scraping, based on [XPath](https://www.w3.o
 
 Finally, it supports [extensions](#extensions) for further tuning.
 
-Feature requests, bug reports, and other contributions are welcome. The best way to contribute is to [open an issue on GitHub](https://github.com/FreshRSS/FreshRSS/issues).
-We are a friendly community.
-
 * Official website: <https://freshrss.org>
 * Demo: <https://demo.freshrss.org/>
 * License: [GNU AGPL 3](https://www.gnu.org/licenses/agpl-3.0.html)
 
 ![FreshRSS logo](docs/img/FreshRSS-logo.png)
 
-# Disclaimer
+## Feedback and contributions
 
-FreshRSS comes with absolutely no warranty.
+Feature requests, bug reports, and other contributions are welcome. The best way is to [open an issue on GitHub](https://github.com/FreshRSS/FreshRSS/issues).
+We are a friendly community.
+
+To facilitate contributions, the following option is available:
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://github.com/codespaces/new?hide_repo_select=true&ref=edge&repo=6322699)
+
+## Screenshot
 
 ![FreshRSS screenshot](docs/img/FreshRSS-screenshot.png)
 
+## Disclaimer
+
+FreshRSS comes with absolutely no warranty.
+
 # [Documentation](https://freshrss.github.io/FreshRSS/en/)
 
 * [User documentation](https://freshrss.github.io/FreshRSS/en/users/02_First_steps.html), where you can discover all the possibilities offered by FreshRSS
@@ -53,16 +61,12 @@ FreshRSS comes with absolutely no warranty.
 	* Recommended extensions: [GMP](https://www.php.net/gmp) (for API access on 32-bit platforms), [IDN](https://www.php.net/intl.idn) (for Internationalized Domain Names), [mbstring](https://www.php.net/mbstring) (for Unicode strings), [iconv](https://www.php.net/iconv) (for charset conversion), [ZIP](https://www.php.net/zip) (for import/export), [zlib](https://www.php.net/zlib) (for compressed feeds)
 * MySQL 5.5.3+ or MariaDB equivalent, or SQLite 3.7.4+, or PostgreSQL 9.5+
 
-
-# Releases
+# [Installation](https://freshrss.github.io/FreshRSS/en/admins/03_Installation.html)
 
 The latest stable release can be found [here](https://github.com/FreshRSS/FreshRSS/releases/latest). New versions are released every two to three months.
 
 If you want a rolling release with the newest features, or want to help testing or developing the next stable version, you can use [the `edge` branch](https://github.com/FreshRSS/FreshRSS/tree/edge/).
 
-
-# [Installation](https://freshrss.github.io/FreshRSS/en/admins/03_Installation.html)
-
 ## Automated install
 
 * [<img src="https://www.docker.com/wp-content/uploads/2022/03/horizontal-logo-monochromatic-white.png" width="200" alt="Docker" />](./Docker/)
@@ -83,7 +87,7 @@ If you want a rolling release with the newest features, or want to help testing
 
 More detailed information about installation and server configuration can be found in [our documentation](https://freshrss.github.io/FreshRSS/en/admins/03_Installation.html).
 
-## Advice
+# Advice
 
 * For better security, expose only the `./p/` folder to the Web.
 	* Be aware that the `./data/` folder contains all personal data, so it is a bad idea to expose it.