switch to docker multistage build

.dockerignore

@@ -1,3 +1,7 @@
 .idea
 .gradle
-.git
+.git
+out/
+build/
+src/ratpack/assets/bower_components/
+src/ratpack/assets/node_modules/

.travis.yml

@@ -15,11 +15,3 @@ cache:
 
 script:
   - ./gradlew check
-
-after_success:
-  - if [ "$TRAVIS_BRANCH" == "master" ]; then
-    ./gradlew shadowJar;
-    docker build -t vrapio/vrap .;
-    docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD";
-    docker push vrapio/vrap;
-    fi

Dockerfile

@@ -1,8 +1,19 @@
+FROM openjdk:8 as builder
+
+RUN curl -sL https://deb.nodesource.com/setup_9.x | bash - \
+    && apt-get update && apt-get install -y nodejs yarn \
+    && node -v && npm -v
+
+WORKDIR /vrap
+COPY . /vrap
+
+RUN ./gradlew clean shadowJar
+
 FROM openjdk:8-jre-alpine
 
 WORKDIR /app
 
-ADD build/libs/vrap-all.jar /app/vrap.jar
+COPY --from=builder /vrap/build/libs/vrap-all.jar /app/vrap.jar
 ADD vrap.sh /app/vrap.sh
 
 ENV JAVA_OPTS  ""

build.gradle

@@ -82,7 +82,7 @@ run {
 }
 
 
-task copyConsolePatch(dependsOn: yarn_install, type: Copy) {
+task copyConsolePatch(dependsOn: npmInstall, type: Copy) {
     from "src/ratpack/assets/oauth2-authorization.html"
     into "src/ratpack/assets/bower_components/oauth-authorization"
 }

docker_build.sh

@@ -1,9 +1,5 @@
 #!/usr/bin/env bash
 
-echo "Building artifact:"
-docker run --rm -v ${PWD}:/vrap -v${HOME}/.gradle:/root/.gradle -w /vrap openjdk:8-alpine ./gradlew shadowJar
-echo "Done."
-
 echo "Build runtime container:"
 docker build --rm -t vrapio/vrap .
 echo "Done."