Update docker base images, copyright year, add self to maintainers

COPYRIGHT

@@ -1,4 +1,4 @@
-Copyright 2013-2021 Thibaut Courouble and other contributors
+Copyright 2013-2022 Thibaut Courouble and other contributors
 
   This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this

Dockerfile

@@ -1,5 +1,4 @@
-FROM ruby:2.7.6
-
+FROM ruby:3.1.2
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true
 

Dockerfile-alpine

@@ -1,4 +1,4 @@
-FROM ruby:2.7.6-alpine
+FROM ruby:3.1.2-alpine
 
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true

docs/maintainers.md

@@ -32,6 +32,7 @@ In order to deploy DevDocs, you must:
 - be given access to DevDocs's [Sentry instance](https://sentry.io/devdocs/devdocs-js/) (for JS error tracking) and familiarize yourself with its UI.
 
 - be provided with DevDocs's S3 credentials, and install (`brew install awscli` on macOS) and [configure](https://docs.aws.amazon.com/cli/latest/reference/configure/) the AWS CLI on your computer. The configuration must add a named profile called "devdocs":
+
   ```
   aws configure --profile devdocs
   ```