replace ubuntu-latest with docker for clarity

forgejo-runner.sh

@@ -24,7 +24,7 @@ function download() {
 function register() {
     local forgejo="$1"
     docker exec --user 1000 forgejo forgejo actions generate-runner-token > forgejo-runner-token
-    timeout --signal=KILL 30 forgejo-runner register --no-interactive --instance "$forgejo" --name runner --token $(cat forgejo-runner-token) --labels ubuntu-latest:docker://node:16-buster,self-hosted
+    timeout --signal=KILL 30 forgejo-runner register --no-interactive --instance "$forgejo" --name runner --token $(cat forgejo-runner-token) --labels docker:docker://node:16-bullseye,ubuntu-latest:docker://node:16-buster,self-hosted
 }
 
 function run() {

testdata/demo/.forgejo/workflows/test.yml

@@ -1,7 +1,7 @@
 on: [push]
 jobs:
   ls:
-    runs-on: ubuntu-latest
+    runs-on: docker
     steps:
       - uses: actions/checkout@v3
       - run: |

testdata/example-container/.forgejo/workflows/test.yml

@@ -1,7 +1,7 @@
 on: [push]
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: docker
     container:
       image: alpine:3.18
     steps:

testdata/example-echo/.forgejo/workflows/test.yml

@@ -1,6 +1,6 @@
 on: [push]
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: docker
     steps:
       - run: echo All Good

testdata/example-service/.forgejo/workflows/test.yml

@@ -2,7 +2,7 @@ on: [push]
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: docker
 
     services:
       pgsql: