Update examples for GITEA_RUNNER_REGISTRATION_TOKEN env (#630)

For go-gitea/gitea#32946

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/630
Reviewed-by: Lunny Xiao <lunny@noreply.gitea.com>
Reviewed-by: techknowlogick <techknowlogick@noreply.gitea.com>
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-committed-by: Zettat123 <zettat123@gmail.com>

Author: Zettat123

examples/docker-compose/README.md

@@ -12,6 +12,11 @@
       retries: 3
       start_period: 30s
       timeout: 10s
+    environment:
+      # GITEA_RUNNER_REGISTRATION_TOKEN can be used to set a global runner registration token.
+      # The Gitea version must be v1.23 or higher.
+      # It's also possible to use GITEA_RUNNER_REGISTRATION_TOKEN_FILE to pass the location.
+      # - GITEA_RUNNER_REGISTRATION_TOKEN=<user-defined registration token>
 
   runner:
     image: gitea/act_runner

examples/kubernetes/dind-docker.yaml

@@ -12,6 +12,9 @@ spec:
 ---
 apiVersion: v1
 data:
+  # The registration token can be obtained from the web UI, API or command-line.
+  # You can also set a pre-defined global runner registration token for the Gitea instance via 
+  # `GITEA_RUNNER_REGISTRATION_TOKEN`/`GITEA_RUNNER_REGISTRATION_TOKEN_FILE` environment variable.
   token: << base64 encoded registration token >>
 kind: Secret
 metadata:

examples/kubernetes/rootless-docker.yaml

@@ -12,7 +12,10 @@ spec:
 ---
 apiVersion: v1
 data:
-  token: << runner registration token goes here >>
+  # The registration token can be obtained from the web UI, API or command-line.
+  # You can also set a pre-defined global runner registration token for the Gitea instance via 
+  # `GITEA_RUNNER_REGISTRATION_TOKEN`/`GITEA_RUNNER_REGISTRATION_TOKEN_FILE` environment variable.
+  token: << base64 encoded registration token >>
 kind: Secret
 metadata:
   name: runner-secret