0.4.0 candidate (#14)

- `cheatset` gem updated to version [1.4.3](https://rubygems.org/gems/cheatset/versions/1.4.3). [My upstream PR](Kapeli/cheatset#35) was accepted and the deprecated URI and `cheatset` now works with Ruby 3

- Pinned the version of `cheatset` as recommended in this [blog post by Florin Lipan](https://lipanski.com/posts/dockerfile-ruby-best-practices#3-pin-your-application-dependencies)

- @dependabot provided a [PR](#12) updating Ruby base image from 2.7-buster to 3.0.2-buster

.wordlist.txt

@@ -13,3 +13,4 @@ toolchain
 prebuilt
 URI
 dependabot
+Lipan

Changelog.md

@@ -1,14 +1,22 @@
 # Change log for Docker-cheatset
 
+## 0.4.0 2021-10-14 Maintenance release
+
+- `cheatset` gem updated to version [1.4.3](https://rubygems.org/gems/cheatset/versions/1.4.3). [My upstream PR](https://github.com/Kapeli/cheatset/pull/35) was accepted and the deprecated URI and `cheatset` now works with Ruby 3
+
+- Pinned the version of `cheatset` as recommended in this [blog post by Florin Lipan](https://lipanski.com/posts/dockerfile-ruby-best-practices#3-pin-your-application-dependencies)
+
+- @dependabot provided a [PR](https://github.com/jonasbn/docker-cheatset/pull/12) updating Ruby base image from 2.7-buster to 3.0.2-buster
+
 ## 0.3.0 2021-02-07 Maintenance release
 
-- Bumped from Ruby 2.6.6 to 2.7
+- Bumped from Ruby 2.6.6-stretch to 2.7-buster, via [PR](https://github.com/jonasbn/docker-cheatset/pull/3)
 
 - Warnings on URI being deprecated, have created [a PR upstream](https://github.com/Kapeli/cheatset/pull/35) exchanging URI for CGI as [per recommendation from the documentation](https://rubyapi.org/2.7/o/uri/escape). `cheatset` version 1.4.2 does not work with Ruby 3
 
 ## 0.2.0 2020-06-06 Maintenance release
 
-- dependabot provided a PR updating ruby from 2.5-stretch to 2.6.6-stretch
+- @dependabot provided a [PR](https://github.com/jonasbn/docker-cheatset/pull/1) updating Ruby base image from 2.5-stretch to 2.6.6-stretch
 
 ## 0.1.0 2020-05-10 Feature release
 

Dockerfile

@@ -1,6 +1,6 @@
 FROM ruby:3.0.2-buster
 
-RUN gem install cheatset
+RUN gem install cheatset -v 1.4.3
 
 WORKDIR /tmp