Update README.md (#3023)

## Description

Changes the name of the docker image that gets build.

## Tests

cli/README.md

@@ -89,22 +89,14 @@ If you fancy Docker, you can also run the CLI within a container.
 Modify the `docker-compose.yml` and add volume. ``cli-data`` volume is
 mandatory, you can add more volumes for your export directory.
 
-Build the docker image
-
+Build and run the container in detached mode
 ```shell
-docker build -t ente:latest .
+docker-compose up -d --build
 ```
-
 Note that [BuildKit](https://docs.docker.com/go/buildkit/) is needed to build
 this image. If you face this issue, a quick fix is to add `DOCKER_BUILDKIT=1` in
 front of the build command.
 
-Start the container in detached mode
-
-```shell
-docker-compose up -d
-```
-
 `exec` into the container
 ```shell
 docker-compose exec ente-cli /bin/sh -c "./ente-cli version"

cli/docker-compose.yml

@@ -1,7 +1,9 @@
-version: '3'
 services:
   ente-cli:
-    image: ente-cli:latest
+    build: 
+      context: .
+      tags:
+        - ente-cli:latest
     command: /bin/sh
     volumes:
       # This is mandatory to mount the local directory to the container at /cli-data