Documentation enhancements (#207)

This PR addresses the issue listed in issue #170 regarding how to set up rootless Docker. It also expands on the documentation to show how to create deployments for different environments.

Co-authored-by: ccureau <ccureau@noreply.gitea.io>
Reviewed-on: https://gitea.com/gitea/act_runner/pulls/207
Reviewed-by: Jason Song <i@wolfogre.com>
Co-authored-by: Chris Cureau <cmcureau@gmail.com>
Co-committed-by: Chris Cureau <cmcureau@gmail.com>

README.md

@@ -88,32 +88,6 @@ You can specify the configuration file path with `-c`/`--config` argument.
 ./act_runner -c config.yaml daemon # run with config file
 ```
 
-### Run a docker container
+### Example Deployments
 
-```sh
-docker run -e GITEA_INSTANCE_URL=http://192.168.8.18:3000 -e GITEA_RUNNER_REGISTRATION_TOKEN=<runner_token> -v /var/run/docker.sock:/var/run/docker.sock -v $PWD/data:/data --name my_runner gitea/act_runner:nightly
-```
-
-The `/data` directory inside the docker container contains the runner API keys after registration.
-It must be persisted, otherwise the runner would try to register again, using the same, now defunct registration token.
-
-### Running in docker-compose
-
-```yml
-...
-  gitea:
-    image: gitea/gitea
-    ...
-
-  runner:
-    image: gitea/act_runner
-    restart: always
-    depends_on:
-      - gitea
-    volumes:
-      - ./data/act_runner:/data
-      - /var/run/docker.sock:/var/run/docker.sock
-    environment:
-      - GITEA_INSTANCE_URL=<instance url>
-      - GITEA_RUNNER_REGISTRATION_TOKEN=<registration token>
-```
+Check out the [examples](examples) directory for sample deployment types.