Make linker version configurable

Dockerfile

@@ -34,9 +34,11 @@ FROM gcr.io/distroless/base-debian12 as distroless-base
 
 FROM distroless-base AS distroless-amd64
 ENV LIB_DIR_PREFIX x86_64
+ENV LINKER=ld-linux-x86-64.so.2
 
 FROM distroless-base AS distroless-arm64
 ENV LIB_DIR_PREFIX aarch64
+ENV LINKER=ld-linux-aarch64.so.1
 
 FROM distroless-$TARGETARCH AS output-image
 
@@ -46,7 +48,7 @@ COPY --from=builder /workspace/fedhcp .
 COPY --from=installer /sbin/setcap /sbin/setcap
 COPY --from=installer /lib/${LIB_DIR_PREFIX}-linux-gnu/libcap.so.2 /lib/${LIB_DIR_PREFIX}-linux-gnu/libcap.so.2
 COPY --from=installer /lib/${LIB_DIR_PREFIX}-linux-gnu/libc.so.6 /lib/${LIB_DIR_PREFIX}-linux-gnu/libc.so.6
-COPY --from=installer /lib/${LIB_DIR_PREFIX}-linux-gnu/ld-linux-x86-64.so.2 /lib/${LIB_DIR_PREFIX}-linux-gnu/ld-linux-x86-64.so.2
+COPY --from=installer /lib/${LIB_DIR_PREFIX}-linux-gnu/${LINKER} /lib/${LIB_DIR_PREFIX}-linux-gnu/${LINKER}
 COPY --from=installer /bin/sh /bin/sh
 
 RUN /sbin/setcap 'cap_net_bind_service,cap_net_raw=+ep' /fedhcp