Fix executor Dockerfile, which wasn't building
The Makefile from the `docker-credential-gcr` repo was removed, so all builds were failing. This PR removes the `make` command and pins `docker-credential-gcr` to a specific commit so that this doesn't happen again.
@@ -32,7 +32,8 @@ RUN GOARCH=$(cat /goarch) && CGO_ENABLED=0 && \
cd /go/src/github.com/GoogleCloudPlatform && \
git clone https://github.com/GoogleCloudPlatform/docker-credential-gcr.git && \
cd /go/src/github.com/GoogleCloudPlatform/docker-credential-gcr && \
- make deps OUT_DIR=/usr/local/bin && \
+ # pin to a specific commit
+ git checkout 4cdd60d0f2d8a69bc70933f4d7718f9c4e956ff8 && \
go build -ldflags "-linkmode external -extldflags -static" -i -o /usr/local/bin/docker-credential-gcr main.go
# Get Amazon ECR credential helper
