install yarn from npm (#3037)

images/linux/scripts/installers/nodejs.sh

@@ -32,12 +32,4 @@ ln -s /usr/local/bin/vercel /usr/local/bin/now
 
 rm -rf ~/n
 
-# Install Yarn repository and key
-curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
-echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
-apt-get update
-
-# Install yarn
-apt-get install -y --no-install-recommends yarn
-
 invoke_tests "Node" "Node.js"

images/linux/toolsets/toolset-1604.json

@@ -296,6 +296,10 @@
         {
             "name": "netlify-cli",
             "command": "netlify"
+        },
+        {
+            "name": "yarn",
+            "command": "yarn"
         }
     ]
 }

images/linux/toolsets/toolset-1804.json

@@ -303,6 +303,10 @@
         {
             "name": "netlify-cli",
             "command": "netlify"
+        },
+        {
+            "name": "yarn",
+            "command": "yarn"
         }
     ]
 }

images/linux/toolsets/toolset-2004.json

@@ -310,6 +310,10 @@
         {
             "name": "lerna",
             "command": "lerna"
+        },
+        {
+            "name": "yarn",
+            "command": "yarn"
         }
     ]
 }