Update README.md

README.md

@@ -15,3 +15,10 @@ same network as this computer.
 # Running on Windows
 
 Right click on sudomemoDNS_##.exe (the ## will instead show the version number) and click on "Run as administrator".
+
+# Building on Windows
+
+Install dnslib and requests via npm (as well as pyinstaller) and then build with pyinstaller:
+
+C:\Users\Administrator\sudomemo-dns>C:\Users\Administrator\AppData\Local\Programs\Python\Python36\Scripts\pyinstaller.exe sud
+omemoDNS_v1.0.spec