Merge pull request #3 from NERC-CEH/data

Updated cml notes

cml.md

@@ -14,10 +14,12 @@ $ cml runner launch \
   --labels="cml,gpu" \
   --idle-timeout=3000
 ```
-replacing `REPO_URL` with your github repository url and `ACCESS_TOKEN` with you gh access token.
+replacing `REPO_URL` with your github repository url and `ACCESS_TOKEN` with you gh access token (created via `<USER> > Settings > Developer settings > Personal access tokens > Tokens (classic) > Generate new token (classic)`). Note that `REPO_URL` should **not** include the `.git` suffix. 
 
 The runner should provide a confirmation message when it is started, but you can check that it is available to your repository by going to github `<REPOSITORY> > Settings > Actions > Runners` and you should see the runner listed.
 
+To ensure that the runner can also write back to gh actions you must set read/write permissions on the repository via `<REPOSITORY> > Settings > Actions > General > Workflow permissions > Read and write permissions`.
+
 ### GH Action
 With the runner available you should now be able to create a workflow to utilise it. Below is an example of a basic action to use the local runner and print the available GPU spec and details:
 ```yaml
@@ -35,4 +37,4 @@ jobs:
         run: |
           nvidia-smi
 ```
-Save this into `.github/workflows/test_gpu.yaml` and open a pull request. The action should execute and the output should provide you details about the available GPU.
+Save this into `.github/workflows/test_gpu.yaml` and open a pull request. The action should execute and the output should provide you details about the available GPU.