Update website Dockerfiles for CVE-2022-0778

[john-odonnell]

Desired Outcome

Upgrade website Docker images to address CVE-2022-0778.

Implemented Changes

Upgrade website Docker images to their Ruby 3.0 counterparts.

Connected Issue/Story

CyberArk internal issue link: CONJSE-1317

Definition of Done

At least 1 todo must be completed in the sections below for the PR to be
merged.

Changelog

• The CHANGELOG has been updated, or
• This PR does not include user-facing changes and doesn't require a
  CHANGELOG update

Test coverage

• This PR includes new unit and integration tests to go with the code
  changes, or
• The changes in this PR do not require tests

Documentation

• Docs (e.g. READMEs) were updated in this PR
• A follow-up issue to update official docs has been filed here: insert issue ID
• This PR does not require updating any documentation

Behavior

• This PR changes product behavior and has been reviewed by a PO, or
• These changes are part of a larger initiative that will be reviewed later, or
• No behavior was changed with this PR

Security

• Security architect has reviewed the changes in this PR,
• These changes are part of a larger initiative with a separate security review, or
• There are no security aspects to these changes

[codeclimate]

Lists should be surrounded by blank lines

[john-odonnell]

@rpothier: Fixed all CC issues but this one, which breaks our typical changelog format. Should be ready for another review.

[rpothier]

LGTM! Just have to make codeclimate happy.

[codeclimate]

Code Climate has analyzed commit 0f85405 and detected 1 issue on this pull request.

Here's the issue category breakdown:

Category	Count
Style	1

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 40.1% (0.0% change).

View more on Code Climate.

[szh]

LGTM!