Desktop app - Detect port and change it if needed

[matextrem]

closes #1371

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Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	1	N/A

• Result: ✅ success
• Annotations: 0 total

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[ghost]

Travis automatic deployment:
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[ghost]

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[ghost]

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[ghost]

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[nicosampler]

is there any reason to distinguish between dev and prod? If not, I would suggest to unify them. As choosing the port could be a feature handy in both environments.

[dasanra]

The difference here is that when launching electron on development we are not using a compiled electron instance. So we are not using the internal express server instance. Instead we are running it using react-hot-loaded server (yarn start) that is used for development

[ghost]

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[ghost]

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[ghost]

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