README.md in prawn-emoji-5.0.0 vs README.md in prawn-emoji-5.1.0

@@ -125,12 +125,12 @@
 ### Running tests in the docker container for development
 
 You can use the docker container for development. This container contains the libraries required for testing, such as diff-pdf.
 
 ```
-$ docker build -t prawn-emoji:latest .
-$ docker run -v $PWD:/src:cached -it prawn-emoji bash
+docker pull ghcr.io/hidakatsuya/ruby-with-diff-pdf:latest
+docker run -v $PWD:/src -it ghcr.io/hidakatsuya/ruby-with-diff-pdf bash
 
 > src#
 ```
 
 You can run test:
@@ -141,10 +141,10 @@
 ```
 
 Or, you can run test instantly like this:
 
 ```
-$ docker run --rm -v $PWD:/src:cached -it prawn-emoji bash -c "bundle install && bundle exec rake test:pdf"
+$ docker run --rm -v $PWD:/src:cached -it ghcr.io/hidakatsuya/ruby-with-diff-pdf bash -c "bundle install && bundle exec rake test:pdf"
 ```
 
 ### Updating the bundled emojis
 
 ```