Install Supabase CLI from npm

docs/index.md

@@ -7,7 +7,11 @@ The action supports `ubuntu-latest`, `windows-latest`, and `macos-latest`, and
 adds the requested `supabase` version to `PATH` for the rest of the job.
 
 If `version` is omitted, the action checks the repository root for `bun.lock`,
-`pnpm-lock.yaml`, or `package-lock.json` and otherwise falls back to `latest`.
+`pnpm-lock.yaml`, or `package-lock.json` and otherwise falls back to npm
+`latest`.
+
+The action provisions Node.js and npm internally; runners only need network
+access to the npm registry.
 
 ## Quick Start
 
@@ -24,19 +28,27 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: supabase/setup-cli@v2
+      - uses: supabase/setup-cli@v3
       - run: supabase init
       - run: supabase db start
 ```
 
-To pin a specific CLI version:
+To pin a fixed npm-published CLI version:
 
 ```yaml
-- uses: supabase/setup-cli@v2
+- uses: supabase/setup-cli@v3
   with:
     version: 2.84.2
 ```
 
+To test the current beta release:
+
+```yaml
+- uses: supabase/setup-cli@v3
+  with:
+    version: beta
+```
+
 ## Resources
 
 - **Source Code**: <https://github.com/supabase/setup-cli>