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
- Add domain mappings with TLS configuration
- Add setup-ssl.sh script for easy deployment

manifests/dev/domain-mapping.yml

@@ -1,4 +1,4 @@
-apiVersion: serving.knative.dev/v1alpha1
+apiVersion: serving.knative.dev/v1beta1
 kind: DomainMapping
 metadata:
   name: 2048-dev.wa.darknex.us
@@ -11,3 +11,5 @@ spec:
     name: game-2048-dev
     kind: Service
     apiVersion: serving.knative.dev/v1
+  tls:
+    secretName: game-2048-dev-cert-secret

manifests/prod/domain-mapping.yml

@@ -1,4 +1,4 @@
-apiVersion: serving.knative.dev/v1alpha1
+apiVersion: serving.knative.dev/v1beta1
 kind: DomainMapping
 metadata:
   name: 2048.wa.darknex.us
@@ -11,3 +11,5 @@ spec:
     name: game-2048-prod
     kind: Service
     apiVersion: serving.knative.dev/v1
+  tls:
+    secretName: game-2048-prod-cert-secret

manifests/staging/domain-mapping.yml

@@ -1,4 +1,4 @@
-apiVersion: serving.knative.dev/v1alpha1
+apiVersion: serving.knative.dev/v1beta1
 kind: DomainMapping
 metadata:
   name: 2048-staging.wa.darknex.us
@@ -11,3 +11,5 @@ spec:
     name: game-2048-staging
     kind: Service
     apiVersion: serving.knative.dev/v1
+  tls:
+    secretName: game-2048-staging-cert-secret