add build instructions

README.md

@@ -1,3 +1,41 @@
 # CyberWOW
 
 A dumb android full node for Wownero.
+
+## How to build
+
+### Compile wownerod for android-arm64
+
+```
+pushd .
+git clone https://github.com/wownero/wownero
+cd wownero
+git submodule init && git submodule update
+
+docker build -f utils/build_scripts/android64.Dockerfile -t wownero-android .
+# Create container
+docker create -it --name wownero-android wownero-android bash
+# Get binaries
+docker cp wownero-android:/src/build/release/bin .
+```
+
+The binary needed is in `./bin/wownerod`.
+
+### Install flutter and make sure it's in path
+
+### Compile CyberWOW
+
+```
+popd
+git clone https://github.com/fuwa0529/cyberwow/
+cd cyberwow
+
+# Copy wownerod that we just built
+cp $PATH_TO_WOWNEROD cyberwow/cyberwow/native/output/a4m64/
+# Generate a dummy x86_64 bin
+touch cyberwow/cyberwow/native/output/x86_64/wownerod
+
+make build
+```
+
+Resulting apk is in `cyberwow/cyberwow/build/app/outputs/apk/release/app-release.apk`.