fix(ab env): check the current host to determine the env

[danilowoz]

You were absolutely right about the method to determine the env 😓

[lbogdan]

Build for latest commit 936e162 is at https://pr5933.build.csb.dev/s/new.

[codesandbox-ci]

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[lbogdan]

Let's use the same logic as for SSE:

codesandbox-client/packages/common/src/components/Preview/index.tsx

Lines 80 to 85 in bb81765

	const getSSEUrl = (sandbox?: Sandbox, initialPath: string = '') =>
	`https://${sandbox ? `${sandbox.id}.` : ''}sse.${
	process.env.NODE_ENV === 'development' || process.env.STAGING
	? sseDomain
	: host()
	}${initialPath}`;

.

[lbogdan]

LGTM