Merge pull request #14 from unasuke/update_readme

Update "Bootstrap Debian 10 (buster)" section in README.md

.gitignore

@@ -3,3 +3,5 @@ debian
 cache/*
 !cache/.gitkeep
 nk.bin
+image/sd.img
+image/work

README.md

@@ -83,25 +83,15 @@ Build Linux
 Bootstrap Debian 10 (buster)
 ----------------------------
 
-1. Partition an SD card into two partitions.
-
-    - 1st: FAT32 (vfat), about 100MB
-    - 2st: ext4, fill the remaining area
-
-1. Build and copy the Linux kernel.
-
-    - Run `make ldefconfig lbuild`.
-    - Copy `/linux-brain/arch/arm/boot/zImage` and `/linux-brain/arch/arm/boot/dts/imx28-evk.dtb` into the 1st partition.
+1. Run `make ldefconfig lbuild`.
 
 1. Run APT cache in background (mandatory): `make aptcache`.
 
-1. Run `make debian`.
+1. Run `make brainux`.
 
-1. Copy all contents in `./debian` into the 2nd partition.
-
-    - `sudo cp -ar ./debian/* /path/to/your/sd/2nd/partition/`
-    - Please make sure that all attributes are preserved with `-a` flag.
+1. Run `make image.sd.img`
 
+1. Confirm that `image/sd.img` is built and burn it to an SD card.
 
 Watch changes in submodules & auto-build
 ----------------------------------------
@@ -118,4 +108,3 @@ What's r3build?
 ---------------
 
 [r3build](https://github.com/puhitaku/r3build) is a smart file watcher that aims to provide hot-reloading feature like Web frontend development.
-