[node] Add support to pre-install npm packages (#763)

[hpe-ykoehler]

No description provided.

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[Samruddhi Khandale (samruddhikhandale)]

Thanks for taking the time in contributing this change, left some review comments!

[Samruddhi Khandale (samruddhikhandale)]

Once this PR is merged, https://github.com/devcontainers/action will run automatically ; which opens a PR that updates the README file based on devcontainer-feature.json and NOTES.md.

Hence, can we revert the changes to this file to avoid merge conflicts? Thanks!

[Samruddhi Khandale (samruddhikhandale)]

Can we bump minor version for this Feature?

features/src/node/devcontainer-feature.json

Line 3 in 0af6bc9

"version": "1.3.1",

[Samruddhi Khandale (samruddhikhandale)]

Suggested change

	"npmInstallPackages": {
	"packages": {

[Samruddhi Khandale (samruddhikhandale)]

We have another PR #768 which is trying to do a similar thing for the Python Feature. Hence, trying to make both of these in sync.

[Samruddhi Khandale (samruddhikhandale)]

Suggested change

	"description": "Additional npm packages to install under the username env."
	"description": "Optional comma separated list of NPM packages to install"

[Samruddhi Khandale (samruddhikhandale)]

Can we expect this ^ input and update the install.sh file accordingly?

[Samruddhi Khandale (samruddhikhandale)]

You can now refer to https://github.com/devcontainers/features/pull/768/files#diff-6625a7f1e4a8571db37cfd33aa0e54a66f6dfda253fcf5f602eabbe5f64f00a2R493-R502

[Samruddhi Khandale (samruddhikhandale)]

Suggested change

	su ${USERNAME} -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm use default && npm install -g ${NPMINSTALLPACKAGES}"
	npm install -g ${NPMINSTALLPACKAGES}"

I don't think we'd need other commands. Example

features/src/node/install.sh

Line 235 in 0af6bc9

npm install -g pnpm

[Samruddhi Khandale (samruddhikhandale)]

There's a possibility that we might run into #702 issue.

Hence, can we move

features/src/node/install.sh

Lines 232 to 234 in 0af6bc9

	[ ! -z "$http_proxy" ] && npm set proxy="$http_proxy"
	[ ! -z "$https_proxy" ] && npm set https-proxy="$https_proxy"
	[ ! -z "$no_proxy" ] && npm set noproxy="$no_proxy"

outside of the condition block so that it can be consumed by both?

[Samruddhi Khandale (samruddhikhandale)]

Also, can we wrap npm install within 👇

   if type npm > /dev/null 2>&1; then
        npm install -g xyz
    else
        echo "Skip installing additional packages because npm is missing"
    fi

[Samruddhi Khandale (samruddhikhandale)]

Can we add test scenarios to validate this new option? Thank you!