update env vars

+ removed the app session secret. it's used where it is set
+ added zip file to make it easier to name the zip and reuse the name

Jenkinsfile

@@ -2,16 +2,13 @@ pipeline {
   agent any
   
   environment {
-    APP_SESSION_SECRET = ''
     DB_NAME = 'url_shortener.db'
+    ZIP_FILE = ''
   }
   stages {
     stage('Init') {
       steps {
         sh 'rbenv local 3.2.2'
-        script {
-	  env.APP_SESSION_SECRET = sh(script: 'ruby secret.rb', returnStdout: true)
-        }
         sh 'echo "ENV[\\\"APP_SESSION_SECRET\\\"] ||= $(ruby secret.rb)" > .env.rb'
         sh 'echo "ENV[\\\"DB_NAME\\\"] ||= \\\"${DB_NAME}\\\"" >> .env.rb'
         sh 'cat .env.rb'
@@ -47,6 +44,9 @@ pipeline {
     }
     stage('Build production deliverable') {
       steps {
+        script {
+          env.ZIP_FILE="url-shortener_$(date "+%Y-%m-%d_%H-%M-%S").tgz"
+        }
         catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
           sh ''' #!/usr/local/bin/bash
             CUR_DIR=$(pwd)
@@ -55,17 +55,17 @@ pipeline {
             cd /tmp/url-shortener
             rm -rf features spec coverage db/*.db .git* Jenkinsfile *.html 
             cd /tmp
-            tar -czvf url-shortener.tgz url-shortener/
-            mv url-shortener.tgz $CUR_DIR
+            tar -czvf $ZIP_FILE url-shortener/
+            mv /tmp/$ZIP_FILE $CUR_DIR/
             '''
         }
-        archiveArtifacts artifacts: 'url-shortener.tgz'
+        archiveArtifacts artifacts: '*.tgz'
       }
     }
     stage('Clean up deliverable') {
       steps {
         sh 'rm -rf /tmp/url-shortener'
-        sh 'rm -rf url-shortener.tgz'
+        sh 'rm -rf $ZIP_FILE'
       }
     }
   }