refine doc; add more deploy instructions

deploy/kubernetes/overlays/autogen.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+REPLICAS=1
+
+for ver in 8.1.0 {9..13}.0.0 {12..12}.0.0-64only
+do
+
+    base_ver=`echo $ver | cut -d'.' -f 1`
+    [[ $ver == *"-64only" ]] && base_ver+='-64only'
+
+    [ -d $ver ] || mkdir $ver
+    cat > $ver/kustomization.yaml <<-END
+bases:
+- ../../base
+
+images:
+- name: redroid/redroid
+  newTag: $ver-latest
+
+patches:
+- target:
+    kind: StatefulSet
+  patch: |-
+    - op: replace
+      path: /metadata/name
+      value: redroid$base_ver
+    - op: replace
+      path: /spec/replicas
+      value: $REPLICAS
+    - op: replace
+      path: /spec/selector/matchLabels/app
+      value: redroid$base_ver
+    - op: replace
+      path: /spec/template/metadata/labels/app
+      value: redroid$base_ver
+END
+
+done