addressing docker not found error

jenkins-setup/pipelines/Jenkinsfile

@@ -1,40 +1,38 @@
 pipeline {
-
   agent {
     docker {
       image 'python:3.11-slim'
-      args '-v /var/run/docker.sock:/var/run/docker.sock'  // so Docker works too
+      args '-v /var/run/docker.sock:/var/run/docker.sock'
     }
   }
+
   environment {
     APP_NAME     = "patient-app"
     DOCKER_USER  = "shashitraining"
     DOCKER_IMAGE = "${DOCKER_USER}/${APP_NAME}"
-    DOCKER_TAG   = "${env.BUILD_NUMBER}"   // or "latest" if you prefer
+    DOCKER_TAG   = "${env.BUILD_NUMBER}"
     APP_DIR      = "logging"
   }
 
   stages {
-    stage('Build') {
+    stage('Install Docker CLI') {
       steps {
-        echo "✅ Building Flask app..."
-        sh "python3 -m py_compile $APP_DIR/patient.py"
+        sh '''
+          apt-get update && apt-get install -y docker.io
+          docker --version
+        '''
       }
     }
 
-    stage('Test') {
+    stage('Build') {
       steps {
-        echo "🧪 Running tests..."
-        sh "echo 'No tests yet - add pytest later'"
+        sh "python3 -m py_compile $APP_DIR/patient.py"
       }
     }
 
     stage('Docker Build') {
       steps {
-        script {
-          echo "🐳 Building Docker image $DOCKER_IMAGE:$DOCKER_TAG"
-          sh "docker build -t $DOCKER_IMAGE:$DOCKER_TAG $APP_DIR"
-        }
+        sh "docker build -t $DOCKER_IMAGE:$DOCKER_TAG $APP_DIR"
       }
     }