improved workflow performance (#336)

Dockerfile

@@ -1,9 +1,8 @@
 # builder stage
 FROM registry.suse.com/bci/golang:1.23 AS builder
 
-RUN zypper --non-interactive install make bash wget ca-certificates
-
-RUN go install github.com/goreleaser/goreleaser/v2@latest
+RUN echo -e "[goreleaser]\nname=GoReleaser\nbaseurl=https://repo.goreleaser.com/yum/\nenabled=1\ngpgcheck=0" > /etc/zypp/repos.d/GoReleaser.repo
+RUN zypper --non-interactive install make bash wget git goreleaser ca-certificates
 
 COPY . /build
 WORKDIR /build

Makefile

@@ -29,7 +29,7 @@ build-all: install fmt vet test
 install:
 	rm -rf $(BINARIES_DIRECTORY)
 	mkdir -p $(BINARIES_DIRECTORY)
-	wget -P $(BINARIES_DIRECTORY) https://github.com/hauler-dev/cosign/releases/download/$(COSIGN_VERSION)/cosign-$(shell go env GOOS)-$(shell go env GOARCH)
+	date > $(BINARIES_DIRECTORY)/date.txt
 	go mod tidy
 	go mod download
 	CGO_ENABLED=0 go install ./cmd/...