Add virtualenv requirements and documentation

We can use python's virtualenv here instead of system packages which
will also facilitate version controlling python dependencies.

.gitignore

@@ -2,3 +2,4 @@
 *.retry
 .vagrant
 ansible.log
+venv

README.md

@@ -16,13 +16,22 @@ You will need to pick a subdomain and delegate its DNS for the system to manage.
 
 The following commands should be run  ***locally on your computer*** in order to install and deploy Lilypad on the remote machines.
 
-## 0. Install the float and LEAP platform pre-requisites
+## 0. Clone the float repository
+
+...and enter it
+
+```shell
+git clone https://0xacab.org/leap/container-platform/lilypad
+cd lilypad
+```
+
+## 1. Install the float and LEAP platform pre-requisites
 
 This installation guide is tested on Debian Bullseye.
 Other Linux distributions might need additional steps to install all requirements in the correct version.
 
 ```shell
-sudo apt-get install golang build-essential bind9utils python3-pysodium python3-jinja2 python3-netaddr python3-openssl python3-yaml python3-six python3-pycryptodome ansible git ansible-mitogen
+sudo apt-get install golang build-essential bind9utils git
 
 go install git.autistici.org/ale/x509ca@latest
 go install git.autistici.org/ale/ed25519gen@latest
@@ -30,14 +39,16 @@ go install git.autistici.org/ai3/go-common/cmd/pwtool@latest
 export PATH=$PATH:$HOME/go/bin
 ```
 
-## 1. Clone the float repository
+We'll use [virtualenv](https://virtualenv.pypa.io/en/latest/) to manage and install python packages:
+```
+virtualenv -p /usr/bin/python3 venv
+source ./venv/bin/activate
+pip install -r ./requirements.txt
+```
 
-...and enter it
+This will create a virtual environment where we can install+version control specific python dependencies.
 
-```shell
-git clone https://0xacab.org/leap/container-platform/lilypad
-cd lilypad
-```
+When working on this project, if you're in a new shell, you'll need to run the `source ./venv/bin/activate` command again to re-enter the virtual environment.
 
 ## 2. Initialize the ansible vault
 

requirements.txt

+ansible==6.2.0
+ansible-core==2.12.10
+cffi==1.15.1
+cryptography==38.0.4
+Jinja2==3.1.2
+MarkupSafe==2.1.1
+mitogen==0.3.3
+netaddr==0.8.0
+packaging==21.3
+pycparser==2.21
+pyOpenSSL==22.1.0
+pyparsing==3.0.9
+pysodium==0.7.12
+PyYAML==6.0
+resolvelib==0.5.4