Sgp/envsetup (#55)

* adding capbility to generate ensemble from era5 data on gcp

* added era5 var selection to main file

* changing environment setup to use python venv

* removed extra file

README.md

@@ -26,11 +26,23 @@ We recommend setting up a virtual environment using either [conda](https://docs.
 
 ```bash
 git clone [email protected]:StevePny/DataAssimBench.git
+cd ./DataAssimBench
 ```
 
+#### Setup virtual environment
+1. In your cloned project directory, create a virtual environment
+
+    ```bash
+    python3 -m venv ./.venv
+    ```
+2. Activate the virtual environment
+
+    ```bash
+    source ./.venv/bin/activate
+    ```
+
 #### Install dabench
 ```bash
-cd ./DataAssimBench
 pip install -e ".[full]"
 ```