chore: Upgrade to node 16

[searchableguy]

Description

Upgrade node version in our dockerfile to node 16. This should apply to all services using the file.

Let's see if it breaks anything.

Issues

Fixes #
Refs #

Checklist:

• 1 PR, 1 purpose: my Pull Request applies to a single purpose
• I have commented my code, particularly in hard-to-understand areas
• I have updated the docs to reflect my changes if applicable
• I have added tests (and stories for frontend components) that prove my fix is effective or that my feature works
• I have performed a self-review of my own code
• If my code involves visual changes, I am adding applicable screenshots to this thread

Release Note Draft Snippet

[searchableguy]

Due to how we detect changes in CI, this won't run all the tests though :/

Is there a way to forcefully run?

[clemsos]

Yes you need to label the PR with run-all-tests then commit sth

[julien51]

Also, want to try 14 first?

[searchableguy]

Breaking changes introduced by npm
npm/cli#1935

We will need to change our scripts a little.

[julien51]

Assigning to @clemsos for the smart contract tests issues...

[julien51]

Team work is dream work!

[julien51]

Annoyingly a bunch of styling things were added. It looks like my vscode prettyfying config has changed? Any hint @searchableguy on how to fix this?

[julien51]

Also that fixes #7510

[julien51]

Ok it looks like we have a green build!