📂 update Red Hat specific files

Dockerfile

@@ -5,10 +5,10 @@ WORKDIR /cosign
 COPY . .
 USER root
 RUN git config --global --add safe.directory /cosign
-RUN GOFLAGS="" make cosign
+RUN make cosign
 
 # Install Cosign
-FROM registry.access.redhat.com/ubi9/ubi-minimal@sha256:0dfa71a7ec2caf445e7ac6b7422ae67f3518960bd6dbf62a7b77fa7a6cfc02b1
+FROM registry.access.redhat.com/ubi9/ubi-minimal@sha256:b40f52aa68b29634ff45429ee804afbaa61b33de29ae775568933c71610f07a4
 
 LABEL description="Cosign is a container signing tool that leverages simple, secure, and auditable signatures based on simple primitives and best practices."
 LABEL io.k8s.description="Cosign is a container signing tool that leverages simple, secure, and auditable signatures based on simple primitives and best practices."
@@ -27,4 +27,4 @@ RUN chgrp -R 0 /${HOME} && chmod -R g=u /${HOME}
 WORKDIR ${HOME}
 
 # Makes sure the container stays running
-CMD ["tail", "-f", "/dev/null"]
+CMD ["tail", "-f", "/dev/null"]

redhat/overlays/Dockerfile

@@ -0,0 +1,30 @@
+# Build stage
+FROM brew.registry.redhat.io/rh-osbs/openshift-golang-builder AS build-env
+
+WORKDIR /cosign
+COPY . .
+USER root
+RUN git config --global --add safe.directory /cosign
+RUN make cosign
+
+# Install Cosign
+FROM registry.access.redhat.com/ubi9/ubi-minimal@sha256:b40f52aa68b29634ff45429ee804afbaa61b33de29ae775568933c71610f07a4
+
+LABEL description="Cosign is a container signing tool that leverages simple, secure, and auditable signatures based on simple primitives and best practices."
+LABEL io.k8s.description="Cosign is a container signing tool that leverages simple, secure, and auditable signatures based on simple primitives and best practices."
+LABEL io.k8s.display-name="Cosign container image for Red Hat Trusted Signer"
+LABEL io.openshift.tags="cosign trusted-signer"
+LABEL summary="Provides the cosign CLI binary for signing and verifying container images."
+LABEL com.redhat.component="cosign"
+
+COPY --from=build-env /cosign/cosign /usr/local/bin/cosign
+RUN chown root:0 /usr/local/bin/cosign && chmod g+wx /usr/local/bin/cosign
+
+#Configure home directory
+ENV HOME=/home
+RUN chgrp -R 0 /${HOME} && chmod -R g=u /${HOME}
+
+WORKDIR ${HOME}
+
+# Makes sure the container stays running
+CMD ["tail", "-f", "/dev/null"]