Why i get error?

Dockerfile

```
FROM certbot/certbot

WORKDIR /
RUN mkdir -p /etc/letsencrypt/live
RUN cd /etc/letsencrypt/live

```

`docker build --no-cache .`

> 
> /bin/sh: cd: line 1: can't cd to /etc/letsencrypt/live: No such file
> or directory
> 
> 
>