Update Visual Regression README File (#1689)

packages/desktop-client/README.md

@@ -37,15 +37,20 @@ First start the dev server:
 ```sh
 HTTPS=true yarn start
 ```
-
-Next, run the standartised docker container and launch the visual regression tests from within it.
+Next, navigate to the root of your project folder, run the standartised docker container, and launch the visual regression tests from within it.
 
 ```sh
 # Run docker container
 docker run --rm --network host -v $(pwd):/work/ -w /work/ -it mcr.microsoft.com/playwright:v1.37.0-jammy /bin/bash
 
+    # If you recieve an error such as "docker: invalid reference format", please instead use the following command:
+    docker run --rm --network host -v ${pwd}:/work/ -w /work/ -it mcr.microsoft.com/playwright:v1.37.0-jammy /bin/bash
+
 # Run the VRT tests: important - they MUST be ran against a HTTPS server
 E2E_START_URL=https://192.168.0.178:3001 yarn vrt
+
+    # To update snapshots, use the following command:
+    E2E_START_URL=https://192.168.0.178:3001 yarn vrt --update-snapshots
 ```
 
 #### Running against a remote server