actions: runner [container].docker_host variations

* automount
* "" or "-"
* unix:///var/run/docker.sock
* tcp://127.0.0.1:2375

actions/example-with-docker-host/.forgejo/workflows/test.yml

@@ -0,0 +1,9 @@
+on: [push]
+
+jobs:
+  build:
+    runs-on: docker
+    container:
+      image: code.forgejo.org/oci/node:20-bookworm
+    steps:
+      - run: "test -e /var/run/docker.sock"

actions/example-with-docker-host/runner-config.yaml

@@ -0,0 +1,30 @@
+
+log:
+  level: debug
+
+runner:
+  file: .runner
+  capacity: 1
+  env_file: .env
+  timeout: 3h
+  insecure: false
+  fetch_timeout: 5s
+  fetch_interval: 2s
+  labels: ["docker:docker://code.forgejo.org/oci/node:20-bookworm"]
+
+cache:
+  enabled: true
+  dir: "/srv/example/cache"
+  host: ""
+  port: 0
+
+container:
+  network: "bridge"
+  privileged: false
+  options:
+  workdir_parent:
+  valid_volumes: ["/srv/example"]
+  docker_host: "unix:///var/run/docker.sock"
+
+host:
+  workdir_parent:

actions/example-with-docker-host/setup.sh

@@ -0,0 +1 @@
+FORGEJO_RUNNER_CONFIG=$EXAMPLE_DIR/runner-config.yaml forgejo-runner.sh reload

actions/example-with-docker-host/teardown.sh

@@ -0,0 +1 @@
+forgejo-runner.sh reload