Update README.md

Author: themichaelyang

README.md

@@ -3,7 +3,7 @@
 1. Install `python3`.
 2. `git clone` this repo
 3. In the project root run: `python3 -m venv ./env`. This will create a virtual environment in `env`, where the project dependencies will be installed.
-4. Activate the virtual environment: `source env/bin/activate` (you'll need to do this again every time you open a new terminal and want to run the scripts)
+4. Activate the virtual environment: `source env/bin/activate` (you'll need to do this again every time you open a new terminal and want to run the scripts). If you are on Windows: `source env/Scripts/activate`
 5. Install the requirements: `pip install -r requirements.txt`
 6. Get the `certs.json` from Michael, or create a new service account with Firebase privileges and download its credentials. This should be placed in the project root as `certs.json`.