Add drone CI config

.drone.yml

@@ -0,0 +1,42 @@
+kind: pipeline
+name: build
+
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+  - name: test
+    image: amazoncorretto:8
+    volumes:
+      - name: deps
+        path: /root/.m2
+    commands:
+      - chmod +x mvnw
+      - ./mvnw test -B
+
+  - name: build
+    image: amazoncorretto:8
+    volumes:
+      - name: deps
+        path: /root/.m2
+    commands:
+      - chmod +x mvnw
+      - ./mvnw package -Dmaven.test.skip -Dcheckstyle.skip -B
+
+  - name: release
+    image: node:14
+    commands:
+      - chmod +x mvnw
+      - npx semantic-release
+    environment:
+      GITHUB_TOKEN:
+        from_secret: github_token
+    when:
+      event:
+        exclude:
+        - tag
+
+volumes:
+  - name: deps
+    temp: {}

.releaserc.json

@@ -0,0 +1,24 @@
+{
+  "tagFormat": "${version}",
+  "branches": [
+    {
+      "name": "master"
+    }
+  ],
+  "plugins": [
+    "@semantic-release/commit-analyzer",
+    "@semantic-release/release-notes-generator",
+    [
+      "@semantic-release/github",
+      {
+        "successComment": false,
+        "failComment": false,
+        "assets": [
+          {
+            "path": "target/*.jar"
+          }
+        ]
+      }
+    ]
+  ]
+}