Missing tar and bzip2 from public.ecr.aws/lambda/nodejs:12 image

I'd suggest these two utils should be included as part of the base image, as during an `npm ci` execution both were needed to properly install `PhantomJS`. I'm aware that this might no be a use case for all setups, but module installation is part of the basics steps of setting up a properly running NodeJS environment, so I might not be the only one to face such a scenario.

BTW, the workaround in the Dockerfile is:
`RUN yum install -y tar bzip2`

Some evidence, just after already having install just `tar`:

```
> phantomjs-prebuilt@2.1.16 install /var/task/node_modules/phantomjs-prebuilt
> node install.js

PhantomJS not found on PATH
Downloading https://github.com/Medium/phantomjs/releases/download/v2.1.1/phantomjs-2.1.1-linux-x86_64.tar.bz2
Saving to /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2
Receiving...

Received 22866K total.
Extracting tar contents (via spawned process)
Error extracting archive
Phantom installation failed Error: Command failed: tar jxf /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2
tar (child): bzip2: Cannot exec: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now

at ChildProcess.exithandler (child_process.js:308:12)
at ChildProcess.emit (events.js:314:20)
at maybeClose (internal/child_process.js:1022:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5) {
killed: false,
code: 2,
signal: null,
cmd: 'tar jxf /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2'
} Error: Command failed: tar jxf /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2
tar (child): bzip2: Cannot exec: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now

at ChildProcess.exithandler (child_process.js:308:12)
at ChildProcess.emit (events.js:314:20)
at maybeClose (internal/child_process.js:1022:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:287:5)
```

And this is the original `tar` related error:

```
Error extracting archive
Phantom installation failed Error: spawn tar ENOENT
at Process.ChildProcess._handle.onexit (internal/child_process.js:268:19)
at onErrorNT (internal/child_process.js:470:16)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
errno: 'ENOENT',
code: 'ENOENT',
syscall: 'spawn tar',
path: 'tar',
spawnargs: [ 'jxf', '/tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2' ],
cmd: 'tar jxf /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2'
} Error: spawn tar ENOENT
at Process.ChildProcess._handle.onexit (internal/child_process.js:268:19)
at onErrorNT (internal/child_process.js:470:16)
at processTicksAndRejections (internal/process/task_queues.js:84:21)
```