added Jenkinsfile

pipelines/Dockerfile

+FROM nginx:1.13.8-alpine
+
+RUN rm -rf /etc/nginx/conf.d
+
+RUN rm -rf /usr/share/nginx/html
+

pipelines/Jenkinsfile

+node() {
+    try {
+        String ANSI_GREEN = "\u001B[32m"
+        String ANSI_NORMAL = "\u001B[0m"
+        String ANSI_BOLD = "\u001B[1m"
+        String ANSI_RED = "\u001B[31m"
+        String ANSI_YELLOW = "\u001B[33m"
+
+        ansiColor('xterm') {
+            stage('Checkout') {
+                cleanWs()
+                checkout scm
+                commit_hash = sh(script: 'git rev-parse --short HEAD', returnStdout: true).trim()
+                env.commit_id = sh(script: "echo " + "form" + "_" + commit_hash + "_" + env.BUILD_NUMBER, returnStdout: true).trim()
+                echo "${env.commit_id}"
+                }
+        }
+
+           stage('docker-build') {
+                sh '''
+                   docker build --no-cache -f pipelines/Dockerfile -t $docker_server/$docker_repo:$commit_id .
+                   '''
+        }
+         stage('docker-push') {
+
+               sh '''
+                  docker push $docker_server/$docker_repo:$commit_id
+                  docker rmi -f $docker_server/$docker_repo:$commit_id
+                  '''
+       }
+
+        stage('ArchiveArtifacts') {
+	       	   sh ("echo ${commit_id} > commit_id.txt")	     
+                    archiveArtifacts "commit_id.txt" 
+                    currentBuild.description = "${commit_id}"
+        }
+
+}
+    catch (err) {
+        currentBuild.result = "FAILURE"
+        throw err
+    }
+}
+