Add top level README

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

README

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+Scope
+=====
+Until now the virtual machines were handled somewhat manually. This
+experimental project is meant to have everyghing needed to deploy the
+virtual machines in git.
+
+It also tries to be enable people to safely bootstrap all the
+VMs. This way there is no more chicken and egg issue, and in case of
+compromise, the VMs can easily and safely be reinstalled.
+
+Backups
+=======
+This repository is also backed up on software heritage.
+
+Bootstrap
+=========
+
+Frist the gnutoo-trisquel-netinstall VM need to be installed. Once
+this is done it can be used to install the gnutoo-trisquel-installer
+VM by using the default options.
+
+When installing it, do not enable SSH as this would expose the VM to
+security risks.
+
+Once this is done, this new gnutoo-trisquel-installer can be used to
+install Guix and generate new Guix VMs like guix-installer-vm or
+audio.experimental.a-lec.org.
+
+The audio.experimental.a-lec.org VM can also be generated from the
+guix-installer-vm.
+
+License
+=======
+All the projects in this git repository are free software: you can
+redistribute them and/or modify them under the terms of the GNU
+General Public License as published by the Free Software Foundation,
+either version 3 of the License, or (at your option) any later
+version.
+
+All the project are distributed in the hope that they will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this project.  If not, see <http://www.gnu.org/licenses/>.