Development environment

• devenv configuration to create a LXC container
• Install npm global with yarn (needed by the backend) and pnpm (needed by Etherpad)
• Install PostgreSQL, create the users and the DBs needed by the backend and Etherpad
• Install Etherpad
• Update the README

inventory/group_vars/all.yml

+---
+# Sysadmins
+system_administrators_group: sysadmin
+
+# Use correct python3 interpeter
+ansible_python_interpreter: "/usr/bin/python3"
+
+
+pyenv_virtualenvs_name: "acoords"
+
+app_user: "acoords"
+app_frontend_path: "/opt/acoords-frontend"
+app_backend_path: "/opt/acoords-backend"
+
+backend_api_root_path: "/api"
\ No newline at end of file