Set up CircleCI

.circleci/config.yml

+# Java Maven CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-java/ for more details
+#
+version: 2
+jobs:
+  build:
+    docker:
+      # specify the version you desire here
+      - image: circleci/openjdk:8-jdk
+
+      # Specify service dependencies here if necessary
+      # CircleCI maintains a library of pre-built images
+      # documented at https://circleci.com/docs/2.0/circleci-images/
+      # - image: circleci/postgres:9.4
+
+    working_directory: ~/repo
+
+    environment:
+      # Customize the JVM maximum heap limit
+      MAVEN_OPTS: -Xmx3200m
+
+    steps:
+      - checkout
+
+      # run tests!
+      - run: mvn clean install --settings "settings.xml"
+workflows:
+  version: 2
+  commit-workflow:
+    jobs:
+      - build
+  scheduled-workflow:
+    triggers:
+      - schedule:
+          cron: "30 1 * * *"
+          filters:
+            branches:
+              only: master
+
+    jobs:
+      - build
+