version_number

Dockerfile

@@ -14,6 +14,9 @@ RUN rm -fr /root/.cache/*
 COPY ./src ./src
 COPY ./public ./public
 
+ARG version_info
+ENV REACT_APP_VERSION_INFO=${version_info}
+
 RUN npm run build
 
 COPY . .

Jenkinsfile

@@ -18,7 +18,10 @@ pipeline {
     stage('Building image') {
       steps{
         script {
-          dockerImage = docker.build imagename
+          commit=$(git rev-parse --short HEAD)
+          date=$(date '+%Y%m%d%H%M%S')
+          version_info="$date-$commit"
+          dockerImage = docker.build(imagename, "--build-arg version_info=$version_info")
         }
       }
     }

src/ChatPage.js

@@ -17,6 +17,11 @@ const ChatPage = () => {
   const [stat, setStat] = useState("start");
   const [err, setErr] = useState("");
   
+  const version = process.env.REACT_APP_VERSION_INFO;
+  if (!version) {
+    console.info("No version information present at build time.");
+  }else{console.info('version: ${version}');}
+  
 
   useEffect(() => {
      if (stat === "waiting"){