Feature update

Dockerfile

@@ -0,0 +1,5 @@
+FROM tomcat:9:0
+COPY target/*.war /usr/local/tomcat/webapps/app.war
+EXPOSE 8080
+#added
+CMD ["nginx", "-g", "daemon off;"]

Jenkinsfile

@@ -0,0 +1,21 @@
+pipeline {
+    agent any
+    stages {
+        stage("Build & Package") {
+            steps {
+                sh "mvn clean package"
+            }
+        }
+        stage("Build Docker Image") {
+            steps {
+                sh "docker build -t trainbook-app ."
+            }
+        }
+        stage("Deploy") {
+            steps {
+                sh "docker rm -f trainbook-container || true"
+                sh "docker run -d --name trainbook-container -p 8082:8080 trainbook-app"
+            }
+        }
+    }
+}