Added scripts to pass version when building docker image

hooks/build

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -ex
+
+if [[ ${SOURCE_BRANCH} == 'master' ]]; then
+    SHLINK_WEB_CLIENT_RELEASE='latest'
+else
+    SHLINK_WEB_CLIENT_RELEASE=${SOURCE_BRANCH#?}
+fi
+
+docker build --build-arg VERSION=${SHLINK_WEB_CLIENT_RELEASE} -t ${IMAGE_NAME} .