fix:[ASSMT-249]: Adding Spinnaker-migration documentation to develope…

…r doc

docs/docs/spinnaker-migration/how-to.md

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+ # Instructions
+
+
+
+## Install Migrator
+
+`curl https://raw.githubusercontent.com/harness/migrator/master/install | sh`
+
+### Test the connection to Harness Account by executing account summary command
+
+`harness-upgrade --api-key API_KEY --account AccountID --env Prod1 account-summary`
+
+## Create migrator-config.yml file
+
+`env: Prod1
+api-key: API_KEY
+account: AccountID
+platform: spinnaker
+spinnaker-host: harness-eval.dynamo-staging.eng.armory.io
+project: ProjectID
+org: default
+secret-scope: project
+connector-scope: project
+template-scope: project
+workflow-scope: project  `
+
+## Run command
+
+`harness-upgrade --load migrator-config.yml app --app-name prasadtest --auth64 YWRtaW46YWJjMTIz`
+
+## You should get output like this with some prompts:
+
+`INFO[2024-03-04T15:50:38-08:00] Importing the application....                
+INFO[2024-03-04T15:50:38-08:00] 
+Migration details:
+  Platform: spinnaker
+  Spinnaker Host: harness-eval.dynamo-staging.eng.armory.io
+  App name: prasadtest
+  Pipeline Name: 
+  Authentication method: basic 
+  Insecure: false 
+? Do you want to proceed with application migration? Yes
+INFO[2024-03-04T15:50:41-08:00] Spinnaker migration completed`

docs/docs/spinnaker-migration/intro.md

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+---
+sidebar_position: 1
+slug: /
+---
+
+# Introduction
+
+This tool was developed by Harness to assist in the migration process from Spinnaker to CD Next Gen. It can migrate specific Harness resources or multiple resources at once.
+
+### Who is the Tool intended for?
+
+This tool is designed for customers, CSMs, and developers who are currently using Spinnaker and wish to migrate their accounts to Harness CD Next Gen.
+
+### Key Components that can be migrated
+The following key components can be migrated using this tool:

docs/docs/spinnaker-migration/prerequisites.md

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+---
+sidebar_position: 3
+slug: /prerequisites
+---
+
+# Prerequisites
+
+Before using the Spinnaker to CD Next Gen migration tool, you must have the following prerequisites:
+
+- Armory Account - Armory Platform | Spinnaker 
+
+- Harness Account - <AccountID>
+
+- Harness Org - default> if not provided
+
+- Harness Project - <Project_Name>
+
+- API Key - Follow instructions at Manage API keys | Harness Developer Hub 
+
+- Environment - Prod, Prod1, or Prod3