Update Single value Env variable in multi tier.

labs/shipped-multi-tier/3.md

@@ -19,7 +19,7 @@ You are now ready to deploy *Postgres*, *vote-api*, and *vote-ui* services. The
 
 1. Select **Postgres** and the environment (Test), click **Deploy Build**. 
 
-1. Copy the environment variables of Postgress, which you need to set for vote-api and vote-ui. 
+1. As we need connection string to connect our API to Postgres DB, So we need to copy the environment variable name "HOST_POSTGRES" (naming convention "HOST_"$servicename) of Postgress, which you need to set for vote-api and vote-ui. 
 
     2. Click **Settings**. 
     3. Scroll down to the **Deployment Configurations** section. 
@@ -53,25 +53,10 @@ You are now ready to deploy *Postgres*, *vote-api*, and *vote-ui* services. The
 <td>Value</td>
 </tr>
 <tr>
-<td>SEED_PORT</td>
-<td>4001</td>
-</tr>
-<tr>
-<td>HOST_VOTE_API</td>
-<td>http://test--multitierapp--vote-api--254b61.gce.shipped-cisco.com</td>
-</tr>
-<tr>
-<td>HOST_VOTE_UI</td>
-<td>http://test--multitierapp--vote-ui--247fa6.gce.shipped-cisco.com</td>
-</tr>
-<tr>
-<td>SEED_HOST</td>
-<td>test--multitierapp--postgres--d1329f-0.service.consul</td>
-</tr>
-<tr>
-<td>HOST_POSTGRES</td>
-<td>http://test--multitierapp--postgres--d1329f.gce.shipped-cisco.com</td>
+<td>CONNECTION_STRING</td>
+<td>postgres:postgres@shipped-tx3-worker-004:4005/postgresDB</td>
 </tr>
+
 </table>
 
 1. Click **Save**.