Add Linux App Store Web Portal with Kubernetes deployment

- React-style static web portal with Tailwind CSS
- OS detection (Debian/Ubuntu, Fedora, Arch, Generic)
- Dynamic install commands (apt://, appstream://, flatpak)
- 9 pre-configured applications
- Kubernetes: 2 replicas, LoadBalancer service, Nginx ingress
- GitLab Container Registry (git.giaco.net/capitano/webapplinux)
- Namespace: linuxwebapp
- Added Dockerfile, nginx.conf, deploy.sh, docker-compose.yml
- Updated README.md with deployment instructions

k8s/service.yaml

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: linux-app-store-service
+  namespace: linuxwebapp
+  labels:
+    app: linux-app-store
+spec:
+  type: LoadBalancer
+  selector:
+    app: linux-app-store
+  ports:
+  - port: 80
+    targetPort: 80
+    protocol: TCP
+    name: http