fix(stateConfig): incorrect env var for dev-proxy port

[infoxicator]

SERVICES_PORT envVar doesn't exist the correct one is HTTP_ONE_APP_DEV_PROXY_SERVER_PORT for the proxy server port.

Description

Motivation and Context

Fixes an issue where the port for the dev proxy server wasn't picked up due to an incorrect environment variable name

How Has This Been Tested?

Tested by passing the correct variable and now the proxy dev server starts in the desired port instead of 3002 and defaults to 3002 when the variable is not present

Types of Changes

• [ x] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (adding or updating documentation)
• Dependency update

Checklist:

• My change requires a change to the documentation and I have updated the documentation accordingly.
• These changes should be applied to a maintenance branch.
• This change requires cross browser checks.
• Performance tests should be ran against the server prior to merging.
• This change impacts caching for client browsers.
• This change impacts HTTP headers.
• This change adds additional environment variable requirements for One App users.
• I have added the Apache 2.0 license header to any new files created.

What is the Impact to Developers Using One App?

No impact this fixes an issue when overriding the default port for the dev proxy server

[oneamexbot]

📊 Bundle Size Report

file name	size on disk	gzip
app.js	275.3KB	82.2KB
runtime.js	15KB	5.4KB
vendors.js	117.2KB	36.4KB
app~vendors.js	432.4KB	112.2KB
service-worker-client.js	17KB	5.2KB
legacy/app.js	290.6KB	85.3KB
legacy/runtime.js	15KB	5.4KB
legacy/vendors.js	163.4KB	44.7KB
legacy/app~vendors.js	441.3KB	114.5KB
legacy/service-worker-client.js	17.5KB	5.4KB

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