update wercker.yml and docs

README.md

@@ -79,7 +79,7 @@ On-premise
 ### Dependencies
 
 - node 8.x (DON'T USE 9.x)
-- npm 5.x
+- npm 6.x
 - yarn
 - MongoDB 3.x
 

wercker.yml

@@ -18,9 +18,8 @@ test:
     - script:
       name: print dependencies
       code: |
-        node -v
-        npm -v
-        yarn -v
+        echo -n "node " && node -v
+        echo -n "npm " && npm -v
         yarn list --depth=0
 
     - script:
@@ -57,9 +56,8 @@ build-prod:
     - script:
       name: print dependencies
       code: |
-        node -v
-        npm -v
-        yarn -v
+        echo -n "node " && node -v
+        echo -n "npm " && npm -v
         yarn list --depth=0
 
     - script:
@@ -106,9 +104,8 @@ build-dev:
     - script:
       name: print dependencies
       code: |
-        node -v
-        npm -v
-        yarn -v
+        echo -n "node " && node -v
+        echo -n "npm " && npm -v
         yarn list --depth=0
 
     - script: