build method
Run the given actions to initialize the host. This can only be called once.
Implementation
Host build() {
if (_hostBuilt) {
throw Exception('Build can only be called once.');
}
_hostBuilt = true;
_initializeHostConfiguration();
_initializeHostingEnvironment();
_initializeHostBuilderContext();
_initializeAppConfiguration();
_initializeServiceProvider();
return resolveHost(_appServices!);
}