Updated readme, changed supported build environment to Bionic

README.md

@@ -1,16 +1,19 @@
-# Armbian
+# Armbian #
 
-Ubuntu and Debian images for ARM based single-board computers
-https://www.armbian.com
+Debian based Linux for ARM based single-board computers 
 
-## How to build my own image or kernel?
+----------
+[https://www.armbian.com](https://www.armbian.com "Armbian")
 
-Supported build environments:
 
-- [Ubuntu Xenial 16.04 x64](http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/mini.iso) guest inside a [VirtualBox](https://www.virtualbox.org/wiki/Downloads) or other virtualization software,
-- [Ubuntu Xenial 16.04 x64](http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/mini.iso) guest managed by [Vagrant](https://www.vagrantup.com/). This uses Virtualbox (as above) but does so in an easily repeatable way. Please check the [Armbian with Vagrant README](https://docs.armbian.com/Developer-Guide_Using-Vagrant/) for a quick start HOWTO,
-- [Ubuntu Xenial 16.04 x64](http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/mini.iso) inside a [Docker](https://www.docker.com/), [systemd-nspawn](https://www.freedesktop.org/software/systemd/man/systemd-nspawn.html) or other container environment [(example)](https://github.com/igorpecovnik/lib/pull/255#issuecomment-205045273). Building full OS images inside containers may not work, so this option is mostly for the kernel compilation,
-- [Ubuntu Xenial 16.04 x64](http://archive.ubuntu.com/ubuntu/dists/xenial-updates/main/installer-amd64/current/images/netboot/mini.iso) running natively on a dedicated PC or a server (**not** recommended unless you build kernel only, for full OS images always use virtualization as outlined above),
+# How to build an image or a kernel?
+
+Supported build environments is **Ubuntu Bionic 18.04 x64** ([minimal iso image](http://archive.ubuntu.com/ubuntu/dists/bionic/main/installer-amd64/current/images/netboot/mini.iso)).
+
+- guest inside a [VirtualBox](https://www.virtualbox.org/wiki/Downloads) or other virtualization software,
+- guest managed by [Vagrant](https://www.vagrantup.com/). This uses Virtualbox (as above) but does so in an easily repeatable way. Please check the [Armbian with Vagrant README](https://docs.armbian.com/Developer-Guide_Using-Vagrant/) for a quick start HOWTO,
+- inside a [Docker](https://www.docker.com/), [systemd-nspawn](https://www.freedesktop.org/software/systemd/man/systemd-nspawn.html) or other container environment [(example)](https://github.com/armbian/build/pull/255#issuecomment-205045273),
+- running natively on a dedicated PC or a server (**not** recommended),
 - **20GB disk space** or more and **2GB RAM** or more available for the VM, container or native OS,
 - superuser rights (configured `sudo` or root access).
 
@@ -27,13 +30,22 @@ You will be prompted with a selection menu for a build option, a board name, a k
 
 Build process uses caching for the compilation and the debootstrap process, so consecutive runs with similar settings will be much faster.
 
-## Reporting issues
+# How to report issues?
 
 Please read [this](https://github.com/igorpecovnik/lib/blob/master/.github/ISSUE_TEMPLATE.md) notice first before opening an issue.
 
-## More info:
+# How to contribute?
 
-- [Documentation](https://docs.armbian.com/Developer-Guide_Build-Preparation/)
-- [Prebuilt images](https://www.armbian.com/download/)
+- [Fork](https://help.github.com/articles/fork-a-repo/) the project
+- Make one or more well commented and clean commits to the repository. 
+- Perform a [pull request](https://help.github.com/articles/creating-a-pull-request/) in github's web interface.
+
+If it is a new feature request, don't start the coding first. Remember to [open an issue](https://guides.github.com/features/issues/) to discuss the new feature.
+
+If you are struggling, check [this detailed step by step guide on contributing](https://www.exchangecore.com/blog/contributing-concrete5-github/).
+
+## Where to get more info?
+
+- [Documentation](https://docs.armbian.com/Developer-Guide_Build-Preparation/ "Developer resources")
+- [Prebuilt images](https://www.armbian.com/download/ "Download section")
 - [Support forums](https://forum.armbian.com/ "Armbian support forum")
-- [Project at Github](https://github.com/igorpecovnik/lib)