Add a new app: QR code generator for campaign (#75)

* Initialize a new NX project - QR campaign

* Develop QR code generator app for campaign

* Add deployment script

Add Dockerfile, docker compose, and update Nix config for deployment

* Revert package.json to fix ci

* Revert package-lock.json to ensure ci (Nix build & cache) successful

docker-compose-qrcampaign.yml

@@ -0,0 +1,9 @@
+services:
+  qrcampaign:
+    build:
+      context: .
+      dockerfile: docker/qrcampaign.Dockerfile
+    ports:
+      - '127.0.0.1:3006:80'
+    restart: unless-stopped
+    container_name: qrcampaign