Add "Advanced usage" to readme

README.md

@@ -35,6 +35,55 @@ CMD [ "main.handler" ]
 
 Available tags are listed [here](https://hub.docker.com/r/umihico/aws-lambda-selenium-python/tags)
 
+## Advanced usage
+
+To get more than a minimal example, change the code and then run the container
+
+```
+docker run --name demo -p 9000:8080 umihico/aws-lambda-selenium-python:latest
+```
+
+### Dynamic url
+
+Change [this line](https://github.com/umihico/docker-selenium-lambda/blob/main/main.py#L25) to `chrome.get(event.get("url"))` and invoke the url set by [amazon/aws-lambda-python](https://hub.docker.com/r/amazon/aws-lambda-python#usage), any JSON in -d is passed to the function's event argument
+
+```
+curl "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{"url": "https://example.com"}'
+```
+
+You can also have a fallback like `chrome.get(event.get("url", "https://example.com"))`, in which case you can invoke the url like this
+
+```
+curl "http://localhost:9000/2015-03-31/functions/function/invocations" -d '{}'
+```
+
+With sls, you can pass the url argument to a Lambda deployed on AWS
+
+```
+sls invoke --function demo --data '{"url": "https://github.com"}'
+```
+
+### Local execution
+
+Add the following to the end of main.py
+
+```
+if __name__ == "__main__" and os.getenv("AWS_LAMBDA_FUNCTION_NAME") is None:
+    print(handler())
+```
+
+Now you can run the function outside of Lambda
+
+```
+docker exec demo python main.py
+```
+
+You can add a dynamic url to this setup with something like
+
+```
+event = {"target": sys.argv[1]} if len(sys.argv) > 1 else {}
+```
+
 ## Side Project
 
 Are you interested in **Node.js** or **Playwright**? Please check out [docker-playwright-lambda](https://github.com/umihico/docker-playwright-lambda)