README Update

docker/README.md

@@ -166,3 +166,65 @@ through the single page client now.
 
 You may have to click Sign in to Gitlab on the Client page
 and authorize access to the shown application.
+
+## Adding a new user
+
+To add a new user to your DTaaS instance, follow these steps:
+
+- Add the user to your Gitlab instance.
+  Note the username and email ID used in 
+  their Gitlab instance account. Consider the
+  username to be `user4` and email ID to be
+  `[email protected]` for the following discussion
+
+- Add a new ML workspace for the user
+  in the compose.users.yml file.
+  A sample user (user3) is shown there,
+  to add more users, simply copy the entire
+  `user3` service and paste it below.
+
+- Edit the required fields in the new
+  ML workspace. This includes
+
+  - Changing the service name from
+    `user3` to `user4`
+  - Changing `${username3}` to
+    `${username4}`
+  - Changing `...routers.u3...` in `labels` to
+    `...routers.u4...`
+
+- Edit the `.env` file by adding a new username variable,
+  like `username4=user4`
+
+- Add two lines to the `conf.local` file
+
+```txt
+rule.onlyu4.action=allow
+rule.onlyu4.rule=PathPrefix(`/user4`)
+```
+
+- Add three lines to the `conf.server` file
+
+```txt
+rule.onlyu3.action=auth
+rule.onlyu3.rule=PathPrefix(`/user3`)
+rule.onlyu3.whitelist = [email protected]
+```
+
+A new user is now added to the DTaaS instance. 
+
+## Run with additional users
+
+To run the DTaaS instance with the additional users, use to commands:
+
+### Server deploy
+
+```bash
+docker compose -f compose.server.yml -f compose.users.yml --env-file .env up -d
+```
+
+### Localhost deploy
+
+```bash
+docker compose -f compose.local.yml -f compose.users.yml --env-file .env up -d
+```