Move conformance image to debian:stretch-slim

Pros:
- really small image (see comparison below)
- we need to get rid of hyperkube in upcoming releases

```
davanum@cloudshell:~$ docker images
REPOSITORY                                       TAG                 IMAGE ID            CREATED             SIZE
debian                                           stretch-slim        4e6990ebcef5        4 days ago          55.3MB
gcr.io/google-containers/debian-hyperkube-base   0.12.1              a46476511725        13 months ago       393MB
```
This commit is contained in:
Davanum Srinivas 2020-03-01 09:10:07 -05:00 committed by GitHub
parent debb1edee1
commit bdea23380b
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@ -31,7 +31,7 @@ E2E_GO_RUNNER_BIN?=$(shell test -f $(LOCAL_OUTPUT_PATH)/go-runner && echo $(LOCA
CLUSTER_DIR?=$(shell pwd)/../../../cluster/
BASEIMAGE=k8s.gcr.io/debian-hyperkube-base-$(ARCH):0.12.1
BASEIMAGE=debian:stretch-slim
TEMP_DIR:=$(shell mktemp -d -t conformanceXXXXXX)
all: build