Add build from source

build/build.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -ex
+
+VERSION=`cat VERSION`
+
+# Clone new code
+git clone https://github.com/ProtonMail/proton-bridge.git
+cd proton-bridge
+git checkout $VERSION
+
+# Enable debug log
+sed -i "s/build desktop/-debug build desktop/" Makefile
+
+# Build
+make build-nogui