Optimize image size by removing apt cache

Author: bastjan

Dockerfile

@@ -10,7 +10,7 @@ LABEL org.opencontainers.image.source=https://github.com/projectsyn/container-js
 LABEL org.opencontainers.image.description="Binaries for go-jsonnet"
 LABEL org.opencontainers.image.licenses=MIT
 
-RUN apt-get update && apt-get install -y ca-certificates tzdata && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y ca-certificates tzdata && rm -r /var/lib/apt/lists /var/cache/apt/archives
 
 COPY --from=builder /go/bin/jsonnet* /usr/local/bin/