Apply suggestion from @henderkes

Signed-off-by: Marc <m@pyc.ac>

Author: henderkes

docs/embed.md

@@ -149,7 +149,9 @@ On Linux, the created binary is compressed using [UPX](https://upx.github.io).
 On macOS, to reduce the size of the file before sending it, you can compress it.
 We recommend `xz`.
 
-### Disable UPX
+### Disabling UPX
+
+In case you don't wish to use compression, you can skip it by setting the environment variable `NO_COMPRESS=1` before running build-static.sh:
 
 ```console
 RUN NO_COMPRESS=1 ./build-static.sh