[build] Add developer docs for the build env setup playbooks

this adds instructions for doing development and testing changes
locally using a macOS and windows vms created using quickemu

scripts/ansible/README.md

@@ -0,0 +1,80 @@
+## Ansible playbooks to setup build environment for bitmask-vpn on macOS and Windows
+
+This contains two very simple ansible playbooks to create windows and macOS build hosts, We used ansible to make it scalable to more then one host at a time and for easy extensibility later.
+The `windows` and `macos` subdirectories contain the playbooks and documentation around how to use them. The following sections provide instructions for installing Ansible on the control node and testing these playbooks during development.
+
+### Installing Ansible
+
+We need to install Ansible on the node from where we'll be running the playbooks, we'll need the cli tools `ansible`, `ansible-playbook` to use these playbooks.
+
+> **NOTE:** Control node needs to be a linux or macOS host, we haven't tested from an Windows control node.
+
+You can follow the official documentation for [Installing Ansible](https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html)
+
+Or if you already have `python` installed (which is the case for most linux distros and macOS):
+
+```
+$ python3 -m pip install --user ansible
+
+# Additionally `ansible-lint` is another useful package to install
+```
+
+### Developing
+
+While making changes to these playbooks its very useful to test and verify new changes locally, for this we suggest to use [`quickemu`](https://github.com/quickemu-project) to quickly spin up macOS and Windows test VMs.
+
+#### Installing `quickemu`
+
+At the time of writing this, `quickemu` only supports running on _Linux distros_. There's on-going work to support macOS but not available yet. Please look at their [README](https://github.com/quickemu-project/quickemu#------quickemu) for specific installation instructions for your OS.
+
+#### Testing workflow with `quickemu`
+
+##### Creating a Windows 10 VM
+
+First we need to obtain the Windows 10 installation ISO, run the following commands to download the ISO:
+
+```
+$ mkdir win10 # we are creating this directory which will contain all the files needed by this VM
+$ cd win10
+$ quickget windows 10
+```
+
+After running the above commands, the contents of the `win10` directory should be similar to following:
+
+```
+$ ls win10
+windows-10  windows-10.conf
+```
+More details about the `conf` file's and the directorie's contents can be found in their [README](https://github.com/quickemu-project/quickemu#------quickemu).
+
+Then start the VM and follow the usual windows setup process:
+
+```
+# ensure your inside the win10/ dir
+$ quickemu --vm windows-10.conf
+```
+
+##### Creating a macOS 10.15 VM
+
+Similar to the Windows 10 VM above we first need to obtain the installation image, the following sequence of commands creates a macOS 10.15 VM:
+
+```
+$ mkdir macos-10.15 # dir to contain all the VM related files
+$ cd macos-10.15
+$ quickget macos catalina # download the catalina (10.15) macos image
+
+# once the image is downloaded the contents of macos-10.15/ dir should look similar to following
+$ ls macos-10.15
+macos-catalina  macos-catalina.conf
+```
+
+To start the VM run the following command:
+
+```
+$ cd macos-10.15
+$ quickemu --vm macos-catalina.conf
+```
+This will start the vm and launch _macOS installation wizard_, follow the instructions from [macOS Guest](https://github.com/quickemu-project/quickemu#macos-guest) section of the `quickemu` README to finish the installation.
+
+
+After creating the VM with the desired OS, follow the `README` for the specific [windows](windows/) or [macOS](macos/) playbook.