fix: Do not publish examples

[richgerrard]

Closes: #189

Currently, the examples directory is published in the npm package. This results in jwks-rsa being flagged with CVE-2020-15084 since the example included installs express-jwt. A simple solution to this is to add examples to .npmignore

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Description

In CI checks, consumers of the jwks-rsa node module will scan the resulting images for known security vulnerabilities and block deploys when packages with known vulnerabilities are discovered.

Complicating matters, some modules publish to NPM with "example" directories containing other packages that aren't needed at runtime. This practise stalls deployment pipelines and contributes unwanted files to runtime images.

jwks-rsa:1.5.1 was flagged for including express-jwt:3.4.0 in the examples directory. This package was flagged for containing CVE-2020-15084 at path /usr/src/app/node_modules/jwks-rsa/examples/express-demo/node_modules/express-jwt

References

https://nvd.nist.gov/vuln/detail/CVE-2020-15084

Testing

Publish dry-run:

npm publish --dry-run

Checklist

• [N/A] I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not master

[frederikprijck]

Thanks for this fix @richgerrard!