Add examples directory to Mlflow chart

[diamonwiggins]

No description provided.

[scottrigby]

I think this is great! We can always add more/refine later too. Some suggestions and a question for ya as well

[scottrigby]

typo fix

Suggested change

	genSelfSignedCert: true =
	genSelfSignedCert: true

[scottrigby]

needs newline at EOF

Suggested change

	ignoreTls: false
	ignoreTls: false

[scottrigby]

needs newline at EOF

Suggested change

	existingSecret: "mlflow-postgres-secret"
	existingSecret: "mlflow-postgres-secret"

[scottrigby]

@diamonwiggins I know we discussed on Slack the idea of adding comments about sensitive values to the main values.yaml, and I agree it's not the best place for it.

But since we're informing folks how to do this by example here, what do you think about taking the opportunity to ensure they follow our example securely? What do you think about something like this?

Suggested change

	Be sure that files containing unencrypted sensitive values are never committed to Git. To address this, you can use tools like Sealed Secrets or SOPS to encrypt the values in the file. Or avoid adding these to values files altogether by using `--set` on the command line, which can be combined with the above techniques:
	```bash
	helm install mlflow ./charts/mlflow \
	-f examples/database/external/direct-credentials.yaml \
	--set postgres.auth.username=foo \
	--set postgres.auth.password=bar