document new start procedure for manual install

README.md

@@ -42,23 +42,17 @@ You can start Sirepo with [Docker](https://www.docker.com/).
 If you are running Docker as an ordinary user (recommended), use the following:
 
 ```bash
-$ docker run -it --rm -p 8000:8000 -v "$PWD:/vagrant" radiasoft/sirepo /radia-run "$(id -u)" "$(id -g)" /home/vagrant/bin/radia-run-sirepo /vagrant 8000
+$ docker run -p 8000:8000 -v "$PWD:/sirepo" radiasoft/sirepo
 ```
 
 The `/radia-run` command ensures the guest's user can read/write files from the
 current directory, which is where the database and other files will be stored.
 
+
 Then visit the following link:
 
 [http://localhost:8000/light](http://localhost:8000/light)
 
-You can run sirepo in an emphemeral container as root, but without
-storing files on the host:
-
-```bash
-# docker run -it --rm -p 8000:8000 -u vagrant radiasoft/sirepo bash -l -c 'radia-run-sirepo "$HOME" 8000'
-```
-
 ### Manual Install with Vagrant
 
 You can start Sirepo with [Vagrant](https://www.vagrantup.com/).