Update INSTALL.md for ubuntu 22.04

INSTALL.md

@@ -1,6 +1,6 @@
 # Installing Sous-Chef
 
-These instructions document how to install Sous-Chef on Debian 10.
+These instructions document how to install Sous-Chef on Ubuntu 22.04.
 
 To update an existing installation, see [UPDATE.md](UPDATE.md).
 
@@ -9,17 +9,26 @@ To update an existing installation, see [UPDATE.md](UPDATE.md).
 Become root, then install the dependencies.
 
 ```
-apt install mariadb-server nginx libnginx-mod-http-fancyindex gdal-bin python3 \
-    python3-pip libmariadb-dev-compat
+sudo su -
+apt install --no-install-recommends mariadb-server nginx libnginx-mod-http-fancyindex gdal-bin python3 \
+    python3-pip libmariadb-dev-compat build-essential
+
+# Install python 3.7 (old version)
+add-apt-repository ppa:deadsnakes/ppa -y
+apt update
+apt install --no-install-recommends python3.7 python3.7-distutils python3.7-dev
+wget https://bootstrap.pypa.io/get-pip.py
+python3.7 get-pip.py
+
 # Invoke pip with 'python3 -m pip' to avoid a warning about a wrapper script
-python3 -m pip install -U pip certifi
-python3 -m pip install gunicorn
-python3 -m pip install souschef
+python3.7 -m pip install -U pip certifi
+python3.7 -m pip install gunicorn
+python3.7 -m pip install souschef
 ```
 
 To install a development version of Sous-Chef from the PyPI test index, run:
 ```
-python3 -m pip install --extra-index-url https://test.pypi.org/simple/ souschef==1.3.0.dev2
+python3.7 -m pip install --extra-index-url https://test.pypi.org/simple/ souschef==1.3.0.dev2
 ```
 
 2. Configure the database