* Upgrade go.mod file
* Upgrade travis file
* Run rm -rf vendor && go mod tidy && go mod vendor to upgrade vendor/modules.txt according to golang 1.14
* Upgrade golangci-lint version
I needed this for my arm64 k8s cluster. I have zero Go experience but
enough experience with other things to fix the rebase (I think!). This
patch is working fine on my cluster.
* comments
* initial commit for persisent volume caching
* cache warmer works
* general cleanup
* adding some debugging
* adding missing files
* Fixing up cache retrieval and cleanup
* fix tests
* removing auth since we only cache public images
* simplifying the caching logic
* fixing logic
* adding volume cache to integration tests. remove auth from cache warmer image.
* add building warmer to integration-test
* move sample yaml files to examples dir
* small test fix