Update top-level Makefile

Makefile

@@ -1,12 +1,21 @@
-.PHONY: all build clean docs fmt test 
+.PHONY: all build clean docs fmt run setup test
 
 all: build test
 
+setup:
+	@rustup component add rust-src
+	@rustup component add llvm-tools-preview
+	@cargo install mdbook
+
 build:
-	@cd src && cargo build
+	@cd src && cargo kbuild
+	@cd src && cargo kimage
+
+run: build
+	@cd src && cargo krun
 
 test: build
-	@cd src && cargo test
+	@#cd src && cargo test
 
 docs:
 	@cd src && cargo doc 					# Build Rust docs

README.md

@@ -34,6 +34,18 @@ While there is nothing revolutionary in KxOS, it does explore some new design po
 While most code is written in Rust, the project-scope build process is governed 
 by Makefile.
 
+After downloading the source code, run the following command once to make sure
+all developmennt tools are installed.
+```bash
+make setup
+```
+
+Then, we can build and test the project.
 ```bash
 make
 ```
+
+If everything goes well, then we can run the OS.
+```bash
+make run
+```