Improve development docs

We've learned how to use kubectl patch for local testing

We've also abandoned the automation between github and dockerhub
because we publish updates with sufficient irregularity that it is
better if we take the steps more manually and verify each as we go.

README.md

@@ -26,27 +26,30 @@ devops pipeline.
 Testing new images locally:
 
 ``` bash
-IMAGE=dobbs/farm:1.0.7-pre-22
+TAG=1.0.8-prefer-title
+IMAGE=dobbs/farm:$TAG
 docker build --tag $IMAGE .
 ```
 
 With the local kubernetes example (see [examples/k8s/README.md](./examples/k8s/README.md)):
 
 ``` bash
-export IMAGE=dobbs/farm:1.0.7-pre-22
-docker build --tag $IMAGE .
 k3d image import $IMAGE --cluster wiki
-cd ./examples/k8s/
-perl -pi -e 's{^(\s+image:\s*).*$}{\1 $ENV["IMAGE"]}' wiki.yaml
-kubectl apply -f wiki.yaml
+kubectl patch deployment.apps/wiki-deployment \
+  --type='json' \
+  -p='[{"op": "replace", "path": "/spec/template/spec/containers/0/image", "value":"'$IMAGE'"}]'
 ```
 
-The repos in Dockerhub and GitHub are configured to automatically build new tags.
+# Publish containers with experimental code
 
-# Publish experimental plugins
-
-Invoke Dockerhub and GitHub integration.
+GitHub
 ``` bash
-git tag -am "" '1.0.2-pre-0217'
-git push --atomic origin main '1.0.2-pre-0217'
+git tag -am "" "$TAG"
+git push --atomic origin main "$TAG"
+```
+
+Docker Hub
+
+``` bash
+docker push $IMAGE
 ```