add windows build file

build.bat

@@ -0,0 +1,43 @@
+@echo off
+setlocal enabledelayedexpansion
+
+set PKGSRC=github.com/yggdrasil-network/yggdrasil-go/src/version
+
+set LDFLAGS=-X %PKGSRC%.buildName=%PKGNAME% -X %PKGSRC%.buildVersion=%PKGVER%
+set ARGS=-v
+
+:parse_args
+if "%1"=="" goto end_args
+if "%1"=="-u" set UPX=true
+if "%1"=="-t" set TABLES=true
+if "%1"=="-d" set ARGS=%ARGS% -tags debug & set DEBUG=true
+if "%1"=="-r" set ARGS=%ARGS% -race
+if "%1"=="-p" set ARGS=%ARGS% -buildmode=pie
+if "%1"=="-c" (
+  shift
+  set GCFLAGS=%GCFLAGS% %1
+)
+if "%1"=="-l" (
+  shift
+  set LDFLAGS=%LDFLAGS% %1
+)
+if "%1"=="-o" (
+  shift
+  set ARGS=%ARGS% -o %1
+)
+shift
+goto parse_args
+
+:end_args
+if "%TABLES%"=="" if "%DEBUG%"=="" (
+  set LDFLAGS=%LDFLAGS% -s -w
+)
+
+for %%C in (yggdrasil yggdrasilctl) do (
+  echo Building: %%C.exe
+  go build %ARGS% -ldflags="%LDFLAGS%" -gcflags="%GCFLAGS%" ./cmd/%%C
+
+  if "%UPX%"=="true" (
+    upx --brute %%C.exe
+  )
+)