Add SSL configuration and build workflow

- Add build-image.yml workflow for automated builds to GHCR
- Add SSL certificates and domain configuration for HTTPS
- Update services to use ghcr.io/ghndrx/k8s-game-2048:latest with imagePullPolicy: Always
- Configure Kourier for SSL redirect and domain claims
- Enable HTTPS for all environments: dev, staging, prod

manifests/ssl-certificate.yaml

@@ -0,0 +1,56 @@
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: letsencrypt-prod
+spec:
+  acme:
+    server: https://acme-v02.api.letsencrypt.org/directory
+    email: admin@hndrx.co
+    privateKeySecretRef:
+      name: letsencrypt-prod
+    solvers:
+    - http01:
+        ingress:
+          class: nginx
+    - http01:
+        ingress:
+          class: nginx
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: game-2048-dev-cert
+  namespace: knative-serving
+spec:
+  secretName: game-2048-dev-cert-secret
+  issuerRef:
+    name: letsencrypt-prod
+    kind: ClusterIssuer
+  dnsNames:
+  - "2048-dev.wa.darknex.us"
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: game-2048-staging-cert
+  namespace: knative-serving
+spec:
+  secretName: game-2048-staging-cert-secret
+  issuerRef:
+    name: letsencrypt-prod
+    kind: ClusterIssuer
+  dnsNames:
+  - "2048-staging.wa.darknex.us"
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: game-2048-prod-cert
+  namespace: knative-serving
+spec:
+  secretName: game-2048-prod-cert-secret
+  issuerRef:
+    name: letsencrypt-prod
+    kind: ClusterIssuer
+  dnsNames:
+  - "2048.wa.darknex.us"