Add Docker and Drone configurations

.drone.yml

@@ -0,0 +1,64 @@
+kind: pipeline
+name: default
+type: docker
+
+steps:
+  - name: restore-cache
+    image: drillster/drone-volume-cache
+    settings:
+      restore: true
+      mount:
+        - /drone/src/.gradle-cache
+    volumes:
+      - name: cache
+        path: /cache
+
+  - name: build
+    image: openjdk:16
+    commands:
+      - ./gradlew --no-daemon --build-cache clean assemble
+    environment:
+      GRADLE_USER_HOME: /drone/src/.gradle-cache
+      ORG_GRADLE_PROJECT_BUILD_VERSION: ${DRONE_TAG}
+
+  - name: deploy
+    image: openjdk:16
+    commands:
+      - ./gradlew --no-daemon --info --build-cache jib
+    settings:
+      use_cache: true
+    environment:
+      GRADLE_USER_HOME: /drone/src/.gradle-cache
+      ORG_GRADLE_PROJECT_DOCKER_REGISTRY:
+        from_secret: DOCKER_REPO
+      ORG_GRADLE_PROJECT_BUILD_VERSION: ${DRONE_TAG}
+
+  - name: rebuild-cache
+    image: drillster/drone-volume-cache
+    settings:
+      rebuild: true
+      mount:
+        - /drone/src/.gradle-cache
+    volumes:
+      - name: cache
+        path: /cache
+
+trigger:
+  ref:
+    include:
+      - refs/tags/**
+
+services:
+  - name: docker
+    image: docker:dind
+    privileged: true
+    volumes:
+      - name: dockersock
+        path: /var/run
+
+volumes:
+  - name: dockersock
+    temp: {}
+  - name: cache
+    host:
+      path: /tmp/hits-drone-cache

build.gradle

@@ -1,3 +1,7 @@
+plugins {
+    id "com.google.cloud.tools.jib" version "3.1.1" apply false
+}
+
 group 'com.devsoap.parsers'
 version '1.0'
 

rest-api/build.gradle

@@ -1,3 +1,7 @@
+plugins {
+    id 'com.google.cloud.tools.jib'
+}
+
 dependencies {
     implementation 'io.javalin:javalin:3.13.8'
     implementation "org.thymeleaf:thymeleaf:3.0.11.RELEASE"
@@ -12,3 +16,21 @@ dependencies {
 }
 
 application.mainClass='com.devsoap.parsers.api.Api'
+
+jib {
+    from {
+        image = "openjdk:$targetCompatibility"
+    }
+    to {
+        def registry = findProperty('DOCKER_REGISTRY')
+        image = "${registry ? registry + '/' : ''}${project.group}/${rootProject.name}"
+        tags = [version, 'latest']
+    }
+    container {
+        mainClass = "com.devsoap.parsers.api.Api"
+        jvmFlags = []
+        ports = ['7000']
+        volumes = []
+        environment = [:]
+    }
+}