update build doc

android-builder-docker/README.md

@@ -2,18 +2,16 @@
 
 ## Sync Code
 ReDroid manifest include several branches:
-- `redroid12-gsi`, `redroid-s-beta-3`
-- `redroid11-gsi`, `redroid-11.0.0`
-- `redroid10-gsi`, `redroid-10.0.0`
-- `redroid-9.0.0`, `redroid9-gsi` (experimental)
+- `redroid-12.0.0`
+- `redroid-11.0.0`
+- `redroid-10.0.0`
+- `redroid-9.0.0`
 - `redroid-8.1.0`
 
-branch with `-gsi` is recommended (fully treble / VNDK  enforced).
-
 ```bash
 # fetch code
 
-mkdir aosp && cd aosp
+mkdir ~/redroid && cd ~/redroid
 repo init -u https://github.com/remote-android/platform_manifests.git -b <BRANCH> --depth=1
 repo sync -c --no-tags
 ```
@@ -24,12 +22,19 @@ repo sync -c --no-tags
 # adjust apt.conf and source.list if needed
 docker build --build-arg userid=$(id -u) --build-arg groupid=$(id -g) --build-arg username=$(id -un) -t android-build-trusty .
 
+# start builder
+docker run -it -v ~/redroid:/src android-build-trusty
+
 # *inside* builder container
 cd /src
 
 . build/envsetup.sh
+
 lunch redroid_x86_64-userdebug
-# or lunch redroid_arm64-userdebug
+# redroid_arm64-userdebug
+# redroid_x86_64_only-userdebug (64 bit only, redroid 12)
+# redroid_arm64_only-userdebug (64 bit only, redroid 12)
+
 m
 
 # create redroid docker image in *HOST*