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

apps/qrcampaign/project.json

@@ -0,0 +1,9 @@
+{
+  "name": "qrcampaign",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "sourceRoot": "apps/qrcampaign/src",
+  "projectType": "application",
+  "tags": [],
+  "// targets": "to see all targets run: nx show project qrcampaign --web",
+  "targets": {}
+}