Add README

cloud-functions/trigger-jenkins-middleware/README.md

+# Description
+
+    * This Cloud functions will be triggered based on pubsub message , it reads and get intendID from the message and check GCP firestore if intendId  exist or not 
+    * if IntendId exist in Datastore then fetch pipeline details from it and trigger paramertized jenkin job
+ 
+ 
+# Block diagram of the Flow
+
+
+
+
+# Deployment steps: 
+
+## Create a Jenkin Job and User API token: 
+
+    * Create a paramertized Jenkin Job
+    * Create and API token for the user authentication that is required to trigger jenkins job
+    * Trigger Build remotely check box must checked at the pip;eine configuration and a token must spcified there
+
+    
+
+## Setting up a Pub/Sub topic:
+
+
+    * Specify your Google Cloud project in an environment variable. 
+       export PROJECT_ID=PROJECT_ID 
+
+    * Specify your Google Cloud organization in an environment variable. 
+       export ORG_ID=ORG_ID 
+
+    * Set the project ID for gcloud commands. 
+       gcloud config set project PROJECT_ID 
+
+    * Create the Pub/Sub topic where notifications are published. 
+       gcloud pubsub topics create trigger-email 
+
+    * Specify the topic in an environment variable. 
+       export TOPIC=projects/$PROJECT_ID/topics/trigger-email 
+
+    * Create the subscription that notifies Cloud Functions to send an email or chat message when messages are published to the topic. 
+       gcloud pubsub subscriptions create gcf-trigger-email-asia-east2-trigger-email-sub --topic trigger-email 
+
+
+
+
+## Create the  Cloud Function 
+
+  In this section, you deploy a function that sends notifications to your email account. 
+
+    * Ensure that you're using the same PROJECT_ID you used to create the Pub/Sub topic. 
+
+    * Click Create Function. SendGrid function 
+
+    * Set Function name to send-high-and-critical-finding-email-notification and the Trigger type to Pub/Sub. 
+
+    * Select the Pub/Sub topic that you created in Setting up a Pub/Sub topic. 
+
+    * Click Save, and then click Next. 
+
+    * On the next page, set Runtime to Python 3.10.  
+
+    * In the file list, click requirements.txt and add the following to the text field: sendgrid.[Text Wrapping Break][Text Wrapping Break]SendGrid requirements 
+
+    * Click main.py and replace the contents with your code snippet. 
+
+    * Navigate to the Entry point field and enter the name of the function in the code snippet (send_email_notification, in this example). 
+
+    * Click Deploy. You are returned to the Cloud Functions list where you should see your new function. When a green check mark appears next to the function name, it has been successfully deployed. The process could take a few minutes. 
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