update

README.md

@@ -57,39 +57,35 @@ services:
 
 Replace `myorg` with your org name and paste your token into `ACCESS_TOKEN`.
 
-### 4. Start the runner
+> **Important:** `RUNNER_GROUP` must be `self-hosted`. The GitHub runner group
+> name must match this value exactly (see step 4).
+
+### 4. Create the runner group (name must be `self-hosted`)
+
+The group **name must be exactly `self-hosted`** — it has to match
+`RUNNER_GROUP: self-hosted` in `docker-compose.yml`. Any other name will fail
+registration.
+
+1. Go to **https://github.com/organizations/myorg/settings/actions/runner-groups**.
+2. Create a new group and set **Group name** to `self-hosted` (exact spelling).
+3. **Repository access:** select **Selected repositories**, then choose which repos may use this runner.
+4. Optionally enable **Allow public repositories** if you need runners on public repos (security risk — read GitHub’s warning first).
+5. **Workflow access:** select **All workflows** (or restrict to specific workflows if you prefer).
+
+> Replace `myorg` in the URL above with your actual org name.
+
+### 5. Start the runner
 
 ```bash
 docker compose up -d
 ```
 
-Check it's connected under **GitHub → Org → Settings → Actions → Runners**, then 💥 you're done.
+With `RUNNER_GROUP: self-hosted` set, the runner registers into that group
+automatically. Confirm it under **GitHub → Org → Settings → Actions → Runners**
+(and under **Runner groups → self-hosted**).
 
-## 5. Put the runner in a group
-
-Once the runner shows up, group it so you can control which repos can use it.
-
-### Create the group
-
-1. Go to **https://github.com/organizations/myorg/settings/actions/runner-groups**.
-2. Create a new group named `self-hosted`.
-3. **Repository access:** select **Selected repositories**.
-4. Check **Allow public repositories**
-5. **Workflow access:** select **All workflows**.
-
-### Move the runner into the group
-
-1. Go to **https://github.com/organizations/myorg/settings/actions/runners**.
-2. Find your new runner and click it.
-3. In the **Runner group** section, move it into `self-hosted`
-
-### Assign repositories to the group
-
-Go back to **https://github.com/organizations/myorg/settings/actions/runner-groups**,
-open the `self-hosted` group, and use the **Selected repositories** ⚙️ (cog) button to
-add the repositories that are allowed to use this runner.
-
-> Replace `myorg` in the URLs above with your actual org name.
+If it landed in the Default group instead, open the runner and move it into
+`self-hosted`.
 
 ## Useful commands
 
@@ -107,6 +103,8 @@ create that folder with `mkdir -p data/<org>`.
 
 ## Notes
 
+- The runner group **must** be named `self-hosted` so it matches
+  `RUNNER_GROUP: self-hosted` in `docker-compose.yml`.
 - The default image is mirrored to `git.neo24.net/public/github-action-runner:latest`.
   To re-mirror the upstream image (see `cmd-to-push.txt`):