Add CI (#4)

* Add jcenter repository

.circleci/config.yml

@@ -0,0 +1,55 @@
+version: 2.1
+
+orbs:
+  maven: cloudesire/[email protected]
+
+jobs:
+  build:
+    docker:
+      - image: openjdk:8-jdk
+        environment:
+          - BASE_BUILD_NUM: 0
+
+    environment:
+      MAVEN_OPTS: "-Xmx2048m"
+
+    steps:
+      - checkout
+
+      - setup_remote_docker:
+          version: 18.09.3
+
+      - run:
+          name: Install Docker client
+          command: |
+            set -x
+            VER="18.09.3"
+            curl -L -o /tmp/docker-$VER.tgz https://download.docker.com/linux/static/stable/x86_64/docker-$VER.tgz
+            tar -xz -C /tmp -f /tmp/docker-$VER.tgz
+            mv /tmp/docker/* /usr/bin
+
+      - maven/with_cache:
+          mvn_path: ./mvnw
+          steps:
+            - run:
+                name: Build
+                command: ./mvnw -B install
+
+      - maven/aggregate_test_results
+
+workflows:
+  version: 2
+
+  build:
+    jobs:
+      - build
+
+  nightly:
+    jobs:
+      - build
+    triggers:
+      - schedule:
+          cron: "0 6 * * *"
+          filters:
+            branches:
+              only: master

pom.xml

@@ -75,4 +75,11 @@
 		</plugins>
 	</build>
 
+	<repositories>
+		<repository>
+			<id>jcenter</id>
+			<url>https://jcenter.bintray.com/</url>
+		</repository>
+	</repositories>
+
 </project>