diff --git a/build.properties b/build.properties
new file mode 100644
index 0000000..316115a
--- /dev/null
+++ b/build.properties
@@ -0,0 +1 @@
+version=0.1a
diff --git a/data/Docker/Dockerfile b/data/Docker/Dockerfile
index 7415436..dff9f80 100644
--- a/data/Docker/Dockerfile
+++ b/data/Docker/Dockerfile
@@ -1,5 +1,8 @@
 FROM wordpress:4.9-php7.2-fpm
 
+ARG GIT_COMMIT=unspecified
+LABEL git_commit=$GIT_COMMIT
+
 # install php extensions
 RUN apt-get update
 RUN apt-get install -y libfreetype6-dev libjpeg62-turbo-dev