fix(ci): Fix Docker images and npm registry URL in CI workflows

ts_interfaces/platformservice/letter.ts

@@ -0,0 +1,34 @@
+import * as plugins from '../plugins.js';
+
+export interface IRequest_SendLetter extends plugins.typedrequestInterfaces.implementsTR<
+  plugins.typedrequestInterfaces.ITypedRequest,
+  IRequest_SendLetter
+> {
+  method: 'sendLetter';
+  request: {
+    /**
+     * will be used in logs
+     */
+    description: string;
+    /**
+     * if you send any PDF / invoice that you have not made sure to be letterxpress compliant
+     * we strongly recommend using a cover page
+     */
+    needsCover: boolean;
+    title?: string;
+    from?: plugins.tsclass.business.IAddress;
+    to?: plugins.tsclass.business.IAddress;
+    coverBody?: string;
+    service: ('Einschreiben')[];
+    pdfAttachments?: Array<{
+      name: string;
+      binaryAttachmentString: string;
+    }>
+  };
+  response: {
+    /**
+     * this process id allows status retrieval of the letter
+     */
+    processId: string;
+  };
+}