README.md in prawn-emoji-3.3.0 vs README.md in prawn-emoji-4.0.0.beta.1

@@ -63,11 +63,11 @@
 require 'prawn/emoji'
 ```
 
 ### True Type Font Required
 
-In order to draw Emoji, you must use a True Type Font. I recommend you use a Japanese font.
+In order to draw Emoji, you must use a True Type Font.
 
 ## Configuring Emoji Regex
 
 Emoji Regex is a regular expression used to determine which emoji to draw.
 
@@ -84,11 +84,11 @@
 
 ## Supported Versions
 
 ### Ruby
 
-2.4, 2.5, 2.6, 2.7
+2.5, 2.6, 2.7
 
 ### Prawn
 
 2.2+
 
@@ -96,11 +96,11 @@
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/hidakatsuya/prawn-emoji.
 
 ## Development
 
-### How to test
+### Running tests
 
 Run all tests:
 
 ```
 $ bundle exec rake test
@@ -118,29 +118,28 @@
 $ bundle exec rake test:pdf
 ```
 
 In order to run `test:pdf`, you need to install [diff-pdf](https://github.com/vslavik/diff-pdf) in your environment, or you can run test in the docker container as below.
 
-### How to develop in Docker container
+### 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.
+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-dev .
+$ docker build -t prawn-emoji:latest .
+$ docker run -v $PWD:/src:cached -it prawn-emoji bash
 
-$ docker run -v $PWD:/prawn-emoji -it prawn-emoji-dev bash
-
-> /prawn-emoji#
+> src#
 ```
 
 You can run test:
 
 ```
-> /prawn-emoji# bundle install
-> /prawn-emoji# bundle exec rake test
+> src# bundle install
+> src# bundle exec rake test
 ```
 
-### How to update bundled emojis
+### Updating the bundled emojis
 
 ```
 $ bundle exec rake emoji:update VERSION=<Twemoji version>
 ```