Add "Kanzlei Demo 2" to demos data, Docker setup, and CI pipeline

docker-compose.yml

@@ -37,6 +37,17 @@ services:
     environment:
       - NODE_ENV=production
 
+  ld2:
+    image: registry.boomlab.party/rheinsw/demo-websites/ld2
+    container_name: ld1
+    ports:
+      - "25602:3000"
+    restart: on-failure
+    networks:
+      - demos-net
+    environment:
+      - NODE_ENV=production
+
 networks:
   demos-net:
     driver: bridge