add Jenkins config

Jenkinsfile.txt

@@ -0,0 +1,57 @@
+pipeline {
+    agent {
+        docker {
+            image 'node:20'
+        }
+    }
+
+    stages {
+        stage('install (ci)') {
+            steps {
+                sh 'node -v'
+                sh 'npm -v'
+                script {
+                    String tag = sh(returnStdout: true, script: 'git tag --contains').trim()
+                    String branchName = sh(returnStdout: true, script: 'git rev-parse --abbrev-ref HEAD').trim()
+                    String commit = sh(returnStdout: true, script: 'git log -1 --oneline').trim()
+                    String commitMsg = commit.substring(commit.indexOf(' ')).trim()
+
+                    if (tag) {
+                        currentBuild.displayName = "#${BUILD_NUMBER}, tag ${tag}"
+                    } else {
+                        currentBuild.displayName = "#${BUILD_NUMBER}, branch ${branchName}"
+                    }
+
+                    String author = sh(returnStdout: true, script: "git log -1 --pretty=format:'%an'").trim()
+                    currentBuild.description = "${author}<br />${commitMsg}"
+                    echo 'starting installing'
+                    sh 'npm ci'
+                }
+            }
+        }
+
+        stage('checks') {
+            parallel {
+                stage('eslint') {
+                    steps {
+                        sh 'npm run eslint'
+                    }
+                }
+
+                stage('build') {
+                    steps {
+                        sh 'npm run build'
+                    }
+                }
+            }
+        }
+
+        stage('clean-all') {
+            steps {
+                sh 'rm -rf .[!.]*'
+                sh 'rm -rf ./*'
+                sh 'ls -a'
+            }
+        }
+    }
+}