Add build info to deployed version

ci/build.sh

@@ -14,8 +14,16 @@ build_package() {
     PRODUCTION=1 npm run webpack
 }
 
+build_info() {
+    VERSION=$(git describe --tags --always)
+    echo "version: ${VERSION}" >> dist/version-info.txt
+    echo "time: $(TZ=UTC date +'%Y-%m-%d %H:%M')" >> dist/version-info.txt
+    if [ -n "$TRAVIS" ]; then
+        echo "build id: TRAVIS ${TRAVIS_JOB_NUMBER} (${TRAVIS_BUILD_ID})" >> dist/version-info.txt
+    fi
+}
+
 
 install_closure
 build_package
-
-ls dist/
+build_info