remove alpine image dockerfile

switch to concourse/resource-types-base-image-static as base image

Co-authored-by: Mark Stokan <stokanm@vmware.com>
Co-authored-by: Rui Yang <ruiya@vmware.com>
Signed-off-by: Mark Stokan <stokanm@vmware.com>

Author: markstokan

dockerfiles/alpine/Dockerfile Dockerfiledockerfiles/alpine/Dockerfile renamed to Dockerfile

@@ -1,10 +1,10 @@
-ARG base_image=alpine:latest
+ARG base_image
 ARG builder_image=concourse/golang-builder
 
 FROM ${builder_image} AS builder
 COPY . $GOPATH/src/github.com/concourse/github-release-resource
-WORKDIR $GOPATH/src/github.com/concourse/github-release-resource
 ENV CGO_ENABLED 0
+WORKDIR $GOPATH/src/github.com/concourse/github-release-resource
 RUN go mod vendor
 RUN go build -o /assets/out github.com/concourse/github-release-resource/cmd/out
 RUN go build -o /assets/in github.com/concourse/github-release-resource/cmd/in
@@ -14,8 +14,7 @@ RUN set -e; for pkg in $(go list ./...); do \
 	done
 
 FROM ${base_image} AS resource
-RUN apk update && apk upgrade
-RUN apk add --update bash tzdata ca-certificates
+USER root
 COPY --from=builder /assets /opt/resource
 
 FROM resource AS tests

README.md

@@ -202,11 +202,10 @@ environment is consistent across any `docker` enabled platform. When the docker
 image builds, the test are run inside the docker container, on failure they
 will stop the build.
 
-Run the tests with the following commands for both `alpine` and `ubuntu` images:
+Run the tests with the following command:
 
 ```sh
-docker build -t github-release-resource -f dockerfiles/alpine/Dockerfile .
-docker build -t github-release-resource -f dockerfiles/ubuntu/Dockerfile --build-arg base_image=ubuntu:latest .
+docker build -t github-release-resource --target tests --build-arg base_image=concourse/resource-types-base-image-static:latest .
 ```
 
 ### Contributing