Add virtual environment and how to run notes

docs-src/api/Installation.md

@@ -11,15 +11,29 @@ The code is available on [GitHub]({{ config.repo_url }}). Available package vers
     pip install -U pop
     ```
 
+!!! tip "Using a virtual environment is recommended for reproducibility."
+    Create a virtual environment called `__venv__`:
+    ```bash
+    python3 -m venv __venv__
+    ```
+
+    Activate the virtual environment:
+    ```bash
+    source __venv__/bin/activate
+    ```
+
+    Update pip:
+    ```bash
+    pip install -U pip
+    ```
+
 === "Install via pip"
     To install webqueue2-api 0.9.1, you can run:
 
     ```
     pip install git+{{ config.repo_url }}@0.9.1#egg=webqueue2-api
     ```
 
-    If you'd like a version other than 0.9.1 simply replace the that version number with a different version listed on the [releases page]({{ config.repo_url }}/releases).
-
 === "Install via requirements file"
     To install webqueue2-api 0.9.1, place the following line your requirements file:
 
@@ -28,4 +42,9 @@ The code is available on [GitHub]({{ config.repo_url }}). Available package vers
     pip install -r requirements.txt
     ```
 
-    If you'd like a version other than 0.9.1 simply replace the that version number with a different version listed on the [releases page]({{ config.repo_url }}/releases).
+If you'd like a version other than 0.9.1 simply replace the that version number with a different version listed on the [releases page]({{ config.repo_url }}/releases).
+
+To start the server, run the following while your virtual environment is activated:
+```bash
+gunicorn webqueue2api.api:app
+```