Uses UPX to shrink binary (#1809)

* Tries to use UPX

* Uses harshavardhanj/upx instead

Dockerfile

@@ -44,12 +44,17 @@ ARG TAG=dev
 # Build binary
 RUN CGO_ENABLED=0 go build -ldflags "-s -w -X main.version=$TAG"  -o dozzle
 
+# Use UPX to make the binary smaller
+FROM harshavardhanj/upx:3.95 as upx
+COPY --from=builder /dozzle/dozzle /dozzle
+RUN upx --best --lzma /dozzle
+
 FROM scratch
 
 ENV PATH /bin
 
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
-COPY --from=builder /dozzle/dozzle /dozzle
+COPY --from=upx /dozzle /dozzle
 
 EXPOSE 8080