Use docker instead of machine

.circleci/config.yml

@@ -97,8 +97,8 @@ jobs:
 
   # Same as "publishDocs" but will set an alias afterwards
   "publishDocsWithAlias":
-    machine:
-      image: circleci/classic:latest
+    docker:
+      - image: alpine:3.9
 
     steps:
     - checkout
@@ -108,7 +108,14 @@ jobs:
           key: gradle-cache-v0-{{ checksum "build.gradle.kts" }}-{{ checksum "gradle/wrapper/gradle-wrapper.properties" }}        
 
     # First install now
-    - run: npm install -g now
+    - run: apk update
+    - run: apk add wget
+    - run: wget -q https://github.com/zeit/now-cli/releases/download/13.1.3/now-alpine.gz
+    - run: apk add gunzip
+    - run: gunzip now-alpine.gz
+    - run: mv now-alpine /usr/local/bin/now
+
+    # Then publish it
     - run: ./gradlew publishDocsToNow --zeitToken=$NOW_TOKEN createNowAlias --zeitToken=$NOW_TOKEN
 
 workflows: