feat: initial landing page with K8s deploy config

- Nginx static serving with APP_URL env var
- K8s manifests for prod and staging
- Gitea Actions CI/CD pipeline

.gitea/workflows/deploy.yml

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+name: Deploy
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  build-and-push-prod:
+    name: Build & Push (Prod)
+    runs-on: heavy
+    container: git.batida.io/batida/ci-node:latest
+    steps:
+      - uses: https://git.batida.io/batida/actions-checkout@v4
+      - name: Login to registry
+        run: echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login git.batida.io -u "${{ secrets.REGISTRY_USER }}" --password-stdin
+      - name: Build and push
+        run: |
+          docker build \
+            --build-arg APP_URL=https://app.batida.io \
+            -t git.batida.io/batida/batida-landing:${{ github.sha }} \
+            -t git.batida.io/batida/batida-landing:latest \
+            .
+          docker push git.batida.io/batida/batida-landing:${{ github.sha }}
+          docker push git.batida.io/batida/batida-landing:latest
+
+  deploy-staging:
+    name: Deploy Staging
+    runs-on: heavy
+    needs: [build-and-push-prod]
+    container: git.batida.io/batida/ci-node:latest
+    steps:
+      - name: Deploy to staging
+        run: |
+          echo "$KUBECONFIG_CONTENT" > /tmp/kubeconfig
+          kubectl --kubeconfig /tmp/kubeconfig set image deployment/batida-landing batida-landing=git.batida.io/batida/batida-landing:${{ github.sha }} -n staging
+          kubectl --kubeconfig /tmp/kubeconfig rollout status deployment/batida-landing -n staging --timeout=120s
+        env:
+          KUBECONFIG_CONTENT: ${{ secrets.KUBECONFIG }}
+
+  deploy-prod:
+    name: Deploy Prod
+    runs-on: heavy
+    needs: [deploy-staging]
+    container: git.batida.io/batida/ci-node:latest
+    steps:
+      - name: Deploy to prod
+        run: |
+          echo "$KUBECONFIG_CONTENT" > /tmp/kubeconfig
+          kubectl --kubeconfig /tmp/kubeconfig set image deployment/batida-landing batida-landing=git.batida.io/batida/batida-landing:${{ github.sha }} -n prod
+          kubectl --kubeconfig /tmp/kubeconfig rollout status deployment/batida-landing -n prod --timeout=120s
+        env:
+          KUBECONFIG_CONTENT: ${{ secrets.KUBECONFIG }}

Dockerfile

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+FROM nginx:alpine
+
+ARG APP_URL=https://app.batida.io
+
+COPY index.html /tmp/index.html
+RUN sed -i "s|{{APP_URL}}|${APP_URL}|g" /tmp/index.html
+RUN mv /tmp/index.html /usr/share/nginx/html/index.html
+
+EXPOSE 80

k8s/prod.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: batida-landing
+  namespace: prod
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: batida-landing
+  template:
+    metadata:
+      labels:
+        app: batida-landing
+    spec:
+      tolerations:
+        - key: prod
+          operator: Equal
+          value: "true"
+          effect: NoSchedule
+      nodeSelector:
+        dedicated: prod
+      containers:
+        - name: batida-landing
+          image: git.batida.io/batida/batida-landing:latest
+          ports:
+            - containerPort: 80
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 5
+            periodSeconds: 30
+          resources:
+            requests:
+              memory: "16Mi"
+              cpu: "10m"
+            limits:
+              memory: "64Mi"
+              cpu: "100m"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: batida-landing
+  namespace: prod
+spec:
+  selector:
+    app: batida-landing
+  ports:
+    - port: 80
+      targetPort: 80

k8s/staging.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: batida-landing
+  namespace: staging
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: batida-landing
+  template:
+    metadata:
+      labels:
+        app: batida-landing
+    spec:
+      tolerations:
+        - key: staging
+          operator: Equal
+          value: "true"
+          effect: NoSchedule
+      nodeSelector:
+        dedicated: staging
+      containers:
+        - name: batida-landing
+          image: git.batida.io/batida/batida-landing:staging-latest
+          ports:
+            - containerPort: 80
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 5
+            periodSeconds: 30
+          resources:
+            requests:
+              memory: "16Mi"
+              cpu: "10m"
+            limits:
+              memory: "64Mi"
+              cpu: "100m"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: batida-landing
+  namespace: staging
+spec:
+  selector:
+    app: batida-landing
+  ports:
+    - port: 80
+      targetPort: 80