feat: add CI/CD Jenkins Groovy pipeline and semver releaserc

- Introduced `Jenkinsfile` for a simple CD pipeline
- Added semver using `semantic-release` (`.releaserc`)

Fixes issue #4

.releaserc

@@ -0,0 +1,61 @@
+{
+  "branches": [
+    "master"
+  ],
+  "repositoryUrl": "https://github.com/csye7125-fall2023-group05/webapp.git",
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    "@semantic-release/changelog",
+    [
+      "@semantic-release/npm",
+      {
+        "npmPublish": false
+      }
+    ],
+    [
+      "@semantic-release/git",
+      {
+        "assets": [
+          "package.json",
+          "package-lock.json",
+          "CHANGELOG.md"
+        ]
+      }
+    ],
+    "@semantic-release/github"
+  ],
+  "release": {
+    "verifyConditions": {
+      "path": [
+        "@semantic-release/changelog",
+        "@semantic-release/github",
+        "@semantic-release/git"
+      ]
+    },
+    "analyzeCommits": [
+      "@semantic-release/commit-analyzer"
+    ],
+    "generateNotes": [
+      "@semantic-release/release-notes-generator",
+      {
+        "preset": "angular",
+        "writerOpts": {
+          "commitsSort": [
+            "header"
+          ]
+        }
+      }
+    ],
+    "prepare": [
+      "@semantic-release/git",
+      {
+        "path": "@semantic-release/changelog",
+        "changelogFile": "CHANGELOG.md"
+      }
+    ],
+    "publish": "@semantic-release/github",
+    "success": "@semantic-release/github",
+    "fail": "@semantic-release/github"
+  }
+}

Jenkinsfile

@@ -0,0 +1,54 @@
+pipeline {
+  agent any
+  tools { nodejs "node" }
+  environment {
+    GH_TOKEN = credentials('jenkins-pat')
+  }
+  stages {
+    stage('Clone repository') {
+      when {
+        branch 'master'
+      }
+      steps {
+        cleanWs()
+        checkout scm
+      }
+    }
+    stage('Release with semantic-release') {
+      when {
+        branch 'master'
+      }
+      steps {
+        sh '''
+        npm ci
+        npx semantic-release
+        '''
+      }
+    }
+    stage('Build Image') {
+      when {
+        branch 'master'
+      }
+      steps {
+        sh 'docker build --no-cache -t quay.io/pwncorp/producer:$(npm pkg get version | xargs) -t quay.io/pwncorp/producer:latest -f Dockerfile .'
+      }
+    }
+    stage('Push Image') {
+      when {
+        branch 'master'
+      }
+      steps {
+        withCredentials([usernamePassword(credentialsId: 'dockerHub', passwordVariable: 'DOCKERHUB_PASSWORD', usernameVariable: 'DOCKERHUB_USERNAME')]) {
+          sh 'docker login quay.io -u $DOCKERHUB_USERNAME -p $DOCKERHUB_PASSWORD'
+          sh 'docker image push --all-tags quay.io/pwncorp/producer'
+        }
+      }
+    }
+  }
+  post {
+    always {
+      sh 'docker logout'
+      sh 'docker system prune -a -f'
+    }
+  }
+}