Dockerfile: use ubi8 base image

Signed-off-by: Andrew Schoen <[email protected]>

Author: andrewschoen

Dockerfile

@@ -22,7 +22,7 @@ RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -mod=readonly \
     -a -tags netgo
 
 # Build stage 2
-FROM registry.redhat.io/ubi9/ubi-minimal
+FROM registry.redhat.io/ubi8/ubi-minimal
 
 # Update the image to get the latest CVE updates
 RUN microdnf update -y && \