Migrate ghost from helm to manifests

apps/prod/ghost/deployment-patch.yaml

@@ -0,0 +1,20 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ghost
+  namespace: ghost
+spec:
+  template:
+    spec:
+      containers:
+      - name: ghost
+        env:
+        - name: url
+          value: https://${GHOST_URL}
+        volumeMounts:
+        - name: ghost-content
+          mountPath: /var/lib/ghost/content
+      volumes:
+      - name: ghost-content
+        persistentVolumeClaim:
+          claimName: ghost-content