Add UPX executable compression to Docker build in order to reduce binary and docker image sizes significantly

examples/Dockerfile

@@ -1,10 +1,18 @@
-FROM alpine:3.17.0
+FROM alpine:3.17.0 as builder
+
+RUN apk add --no-cache upx
+ADD ./bin/Purr-musl /app/Purr-musl
+
+RUN upx /app/Purr-musl -o /app/Purr-musl-upx
+
+FROM scratch
 
 WORKDIR /app
 ADD ./views /app/views
 ADD ./src   /app/src
-ADD ./bin/Purr-musl /app/Purr-musl
+
+COPY --from=builder /app/Purr-musl-upx /app/Purr
 
 EXPOSE 3000
 
-ENTRYPOINT ["/app/Purr-musl"]
+ENTRYPOINT ["/app/Purr"]