updates for multi-arch builds

Dockerfile

@@ -1,13 +1,19 @@
 
-FROM alpine:3.16
+FROM alpine:3.17
 
 ENV DOCKER_HOST=unix:///var/run/docker.sock
 
-RUN apk --no-cache add --update docker openrc bash
+ARG DOCKER_VERSION
+
+RUN apk --no-cache add --update \
+	docker=$DOCKER_VERSION \
+	openrc \
+	bash
+
 RUN rc-update add docker boot
 
-COPY docker-setup /
-RUN chmod +x /docker-setup
+COPY docker-setup /bin/
+RUN chmod +x /bin/docker-setup
 
-CMD [ "/docker-setup" ]
+CMD [ "/bin/docker-setup" ]
 ENTRYPOINT [ "/bin/bash", "-l", "-c" ]