README.md: update installation section

Add documentation on how to use the repo version of `acmens`.

1 files changed, 21 insertions, 0 deletions

diff --git a/README.md b/README.md
index d638a93..de469ea 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ It's meant to be run locally from your computer.
 * openssl or libressl
 * python3
 * pip
+* virtualenv (if you want to use the repo version)
 
 ## installation
 
@@ -21,6 +22,26 @@ It's meant to be run locally from your computer.
 pip install acmens
 ```
 
+Or, if you would like to use the repo version:
+
+```sh
+cd /path/to/acmens
+
+# init virtual environment
+make venv
+
+# activate virtual environment
+. .venv/bin/activate
+
+# put acmens in your PATH
+make develop
+# note that any changes you make to acmens.py will be instantly reflected
+# in the acmens in your PATH.
+
+# de-activate the virtual environment:
+deactivate
+```
+
 ## getting/renewing a certificate
 
 First, generate an user account key for Let's Encrypt: