chore: add build command

README.md

@@ -6,4 +6,22 @@ The Zig Programming Language  - https://ziglang.org/
 
 Zig is a general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
 
+<br><br>
+
+
+Build:
+```
+% zig build-exe hello.zig
+```
+
+Build small binary:
+```
+% zig build-exe hello.zig --release-small --strip --single-threaded
+```
+
+Cross compile:
+```
+% zig build-exe hello.zig --release-small --strip --single-threaded -target x86_64-windows
+%
+