[showcase] Investigating max-old-space-size settings

[kelvintaywl]

Description

This PR is to showcase the oddity when we set max-old-space-size for Node, via NODE_OPTIONS, when running sls commands.
Mainly, when using the installed sls standalone binary (via ServerlessFramework orb), we see an odd exit code 4, with this stacktace:

(node:100) WARNING: Exited the environment with code 4
    at exit (internal/process/per_thread.js:172:13)
    at _compile (pkg/prelude/bootstrap.js:1429:29)
    at Module._extensions..js (internal/modules/cjs/loader.js:1218:10)
    at Module.load (internal/modules/cjs/loader.js:1047:32)
    at Module._load (internal/modules/cjs/loader.js:935:14)
    at Module.require (internal/modules/cjs/loader.js:1087:19)
    at require (pkg/prelude/bootstrap.js:1338:31)
    at require (internal/modules/cjs/helpers.js:73:18)
    at /snapshot/serverless/lib/classes/Variables.js:7:20
    at _compile (pkg/prelude/bootstrap.js:1433:22)

Exited with code exit status 4

Looking at that stacktrace, it seems to be a pkg issue.
From what I can gather, the sls binary installed by CircleCI's ServerlessFramework is done as a standalone binary.

I believe ServerlessFramework CLI uses Vercel's pkg tool to package the CLI.

From existing GitHub issues, there seem to be unresolved cases of pkg exiting on exit code 4.

• shed more light on process exit 4 vercel/pkg#1217
• Generated binary exists with exit status 4 vercel/pkg#921

In particularly, this comment from a GitHub user seems to explain the situation, but not the solution:
vercel/pkg#921 (comment)

Solution

Hence, I provided an alternative to deploying, should you need to explicitly set max-old-space-size when deploying with sls.
The solution is basically to forgo the sls standalone binary for now (i.e., not using the ServerlessFramework orb), and explicitly install the ServerlessFramework CLI via NPM and AWS CLI instead.

You can see the differences in this PR's CI build status:

Workflow	Job	Build Status	Spec
main	serverless-deploy-1	❌ see build	NODE_OPTIONS:--max-old-space-size=4096, use ServerlessFramework Orb
alternative	serverless-deploy-2	✅ see build	NODE_OPTIONS:--max-old-space-size=4096, install ServerlessFramework CLI ourselves