fix: shutdown hook configuration is using wrong config key

In the api-server constructor the evaluation for the activation /
deactivation of the shutdown hook is based on the wrong configuration
property so that it always is falling back to the default value and
pre-configured value is not taken.

Closes: hyperledger-cacti#1619
Signed-off-by: Michael Courtin <michael.courtin@accenture.com>

packages/cactus-cmd-api-server/src/main/typescript/api-server.ts

@@ -109,8 +109,10 @@ export class ApiServer {
       throw new Error(`ApiServer#ctor options.config was falsy`);
     }
 
-    this.enableShutdownHook = Bools.isBooleanStrict(options.enableShutdownHook)
-      ? (options.enableShutdownHook as boolean)
+    this.enableShutdownHook = Bools.isBooleanStrict(
+      options.config.enableShutdownHook,
+    )
+      ? (options.config.enableShutdownHook as boolean)
       : true;
 
     if (this.enableShutdownHook) {