Add build script

.gitignore

@@ -3,3 +3,4 @@
 .idea/
 .cargo/
 libs/
+build/

build-all.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+echo "Cleaning output"
+if [[ -d build ]]; then
+	rm -rf build
+fi
+mkdir build
+
+echo "Building app"
+cd openbook-app
+flutter build bundle
+cd ..
+
+echo "Copying app data"
+cp -r openbook-app/build/flutter_assets build/
+cp icudtl.dat build/
+
+echo "Building binaries"
+cargo build --release --target x86_64-unknown-linux-gnu
+cargo build --release --target x86_64-pc-windows-gnu
+
+echo "Copying binaries"
+cp target/x86_64-unknown-linux-gnu/release/openbook-desktop build/
+cp target/x86_64-pc-windows-gnu/release/openbook-desktop.exe build/
+cp target/x86_64-pc-windows-gnu/release/flutter_engine.dll build/