Replace existing defaultConnection file on startup

[kmcginnes]

Description

I noticed that when running Graph Explorer in Neptune Notebook it would sometimes fail to get the default connections. I determined it is because every time the Notebook is rebooted another entry is added to the defaultConnection.json file. But it is missing a comma between them so it is invalid JSON and can't be parsed by the JavaScript code.

So instead, each startup will replace the existing defaultConnection.json file with the current environment values. This will ensure that only one connection is present in the file.

Validation

• Tested in local docker environment with Neptune Notebook like settings

Related Issues

Check List

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