Remove docker info (#1766)

README.md

@@ -48,25 +48,12 @@ git clone https://github.com/excalidraw/excalidraw.git
 | `npm run test:update` | Update test snapshots             |
 | `npm run test:code`   | Test for formatting with Prettier |
 
-### Docker Installation
-
-A production-ready version for deploying to e.g. Kubernetes or OpenShift can be built using Docker.
-
 #### Docker Compose
 
 ```sh
 docker-compose up --build -d
 ```
 
-#### Native Docker
-
-```sh
-docker build -t excalidraw/excalidraw .
-docker run --rm -dit --name excalidraw -p 5000:80 excalidraw/excalidraw:latest
-```
-
-After building the image and running the container, open <http://localhost:5000> to see the application.
-
 ## Contributing
 
 Pull requests are welcome. For major changes, please [open an issue](https://github.com/excalidraw/excalidraw/issues/new) first to discuss what you would like to change.