Add k3s deployment scaffolding for dist/ on Vultr

Ships the static landing page to the existing k3s cluster at
65.20.110.165, served at www.apexturf.es (apexturf.es redirects to
it), using a self-hosted Gitea instance as the container registry.

- deploy/Dockerfile + nginx.conf: nginx:alpine image serving dist/
  (SPA-safe fallback, gzip, cache headers). Build-tested locally
  against the real dist/ output.
- deploy/k8s/apex-turf/: Namespace, Deployment, Service, and two
  Ingresses (www.apexturf.es + a Traefik Middleware redirect from
  the bare domain).
- deploy/k8s/cert-manager/: Let's Encrypt ClusterIssuers (prod +
  staging) for HTTP-01 via the cluster's bundled Traefik.
- deploy/k8s/gitea/: Helm values for a lightweight, SQLite-backed
  Gitea at git.apexturf.es with its container registry enabled.
- docs/DEPLOYMENT.md: full phased runbook with exact commands,
  troubleshooting, and a redeploy cheat sheet.
- docs/README.md: point at the new deploy/ tree and runbook.

Nothing here touches the remote cluster — these are local manifests
and docs for the user to apply themselves.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

deploy/k8s/apex-turf/deployment.yaml

@@ -0,0 +1,46 @@
+# CHANGE ME: replace GITEA_OWNER with your Gitea username/org (see
+# docs/DEPLOYMENT.md Phase 5) before applying, e.g.:
+#   sed -i '' 's/GITEA_OWNER/apexadmin/' deploy/k8s/apex-turf/deployment.yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: apex-turf-web
+  namespace: apex-turf
+  labels:
+    app: apex-turf-web
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: apex-turf-web
+  template:
+    metadata:
+      labels:
+        app: apex-turf-web
+    spec:
+      containers:
+        - name: web
+          image: git.apexturf.es/GITEA_OWNER/apex-turf-web:latest
+          ports:
+            - containerPort: 80
+          resources:
+            requests:
+              cpu: 25m
+              memory: 32Mi
+            limits:
+              cpu: 200m
+              memory: 64Mi
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 2
+            periodSeconds: 5
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 80
+            initialDelaySeconds: 5
+            periodSeconds: 10
+      imagePullSecrets:
+        - name: gitea-registry