Please merge PR to support path-based location strategy in local dev "ionic serve"

[lincolnthree]

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Short description of the problem:

When using path based location strategy (not hash), path based routing results in 404s when dynamic reloading occurs after making any code changes during development.

What behavior are you expecting?

This:

#916

Steps to reproduce:

1. Use path-based routing
2. Navigate to a deep-link
3. Make a code change, webpack hot-reload fails with 404

insert any relevant code between the above and below backticks

Which @ionic/app-scripts version are you using?
1.3.7

Other information: (e.g. stacktraces, related issues, suggestions how to fix, stackoverflow links, forum links, etc)
This pull request fixes the issue quite nicely.

#916

[jayvdb]

It was merged, and revert in 065912e because it was placed before the proxies (and thus broke them) , and #1339 is the current PR.

[Kawzeg]

Placing it after setupProxies(app) is not enough, because the proxies are setup asynchronously.