migrate to v4

public/v4/apps/vsts.yml

@@ -0,0 +1,38 @@
+captainVersion: 4
+services:
+  $$cap_appname:
+    image: microsoft/vsts-agent:$$cap_vsts_version
+    restart: always
+    environment:
+      VSTS_ACCOUNT: $$cap_vsts_account
+      VSTS_TOKEN: $$cap_vsts_token
+      VSTS_AGENT: $$cap_vsts_name
+      VSTS_POOL: $$cap_vsts_pool
+caproverOneClickApp:
+  variables:
+    - id: $$cap_vsts_version
+      label: VSTS Version Tag
+      description: Check out their Docker page for the valid tags https://hub.docker.com/r/microsoft/vsts-agent/tags/
+      defaultValue: ubuntu-16.04-standard
+      validRegex: /^([^\s^\/])+$/
+    - id: $$cap_vsts_account
+      label: VSTS Account
+      description: The name of the Visual Studio account. Take only the account part from your address, e.g. http://{account}.visualstudio.com
+      validRegex: /.{1,}/
+    - id: $$cap_vsts_token
+      label: VSTS Token
+      description: A personal access token (PAT) for the Visual Studio account that has been given at least the Agent Pools (read, manage) scope.
+      validRegex: /.{1,}/
+    - id: $$cap_vsts_name
+      label: VSTS Agent Name
+      validRegex: /.{1,}/
+    - id: $$cap_vsts_pool
+      label: VSTS Pool
+      validRegex: /.{1,}/
+  instructions:
+    start: Official image for the Visual Studio Team Services (VSTS) agent.
+    end: VSTS Agent is deployed and available as $$cap_appname
+  displayName: VSTS
+  isOfficial: true
+  description: VSTS is an integrated development environment (IDE) developed as a software product by Microsoft Corp
+  documentation: Taken from https://hub.docker.com/r/microsoft/vsts-agent/