Add variables to env file creation and prompt if VPN enabled; Fix use…

… case wording

docs/background/uses.md

@@ -14,5 +14,5 @@ sort: 2
   - You can use a different network monitoring tool, like [TShark](https://tshark.dev/) to collect full packet captures by modifying the client's Dockerfile and collection.py script
 - Collect data that resembles real-world client data
   - By modifying the client Dockerfile, you can have the container run background services that add realistic noise to your network data
-- See what different network conditions look like first hand
+- Use a browser window attached to emulated network conditions, see the user experience first hand
   - If you really want to hack the tool, you can connect a VNC to the client containers to run their browser windows as a GUI application!

setup/build_compose.py

@@ -78,13 +78,27 @@ def main(tool_dir, config_file, env_file, data_dir):
 
         if not path_to_check.exists():
             print(f"""
-Looks like your environment file doesn't exist yet.
-Path: {path_to_check}
+Looks like your environment file doesn't exist yet. Path: {path_to_check}
+We'll go ahead and create the file for you.
+""")
+            with open(path_to_check, 'w') as outfile:
+                outfile.write("""
+VPN_USERNAME=
+VPN_USERGROUP=
+VPN_PASSWORD=
+""")
+
+            if config['vpn']['enabled']:
+                print(f"""
+Since you have the VPN enabled, you'll need to add your login credentials now.
+If you need guidance, consult https://dane-tool.github.io/dane/guide/quickstart
+""")
+                input(f"Please add your VPN login credentials to {path_to_check} and press Enter when you're done.")
 
-We'll go ahead and create an empty file for you, but make sure to fill it in
-with your login credentials if you plan on using a VPN! Check the documentation.
+            else:
+                print(f"""
+Make sure to add your login credentials to the file if you plan on using a VPN!
 """)
-            path_to_check.touch()
 
         env_file = '../.env'
     else: