[overture-stack#2] Docker and Compose config

Basic docker configuration, borrowing heavily from EGO.
Set to run by default on port 1234 - this way it is easy to find and change when configuring multiple services on a developer's machine.

overture-stack#2

Author: joneubank

.dockerignore

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+Dockerfile
+.git
+target
+.circleci
+.idea

DockerFile

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+FROM openjdk:8u121-jdk-alpine
+
+ARG MAVEN_VERSION=3.5.2
+ARG SHA=707b1f6e390a65bde4af4cdaf2a24d45fc19a6ded00fff02e91626e3e42ceaff
+ARG BASE_URL=https://apache.osuosl.org/maven/maven-3/${MAVEN_VERSION}/binaries
+
+RUN apk add --no-cache curl tar bash \
+  && mkdir -p /usr/share/maven /usr/share/maven/ref \
+  && curl -fsSL -o /tmp/apache-maven.tar.gz ${BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
+  && echo "${SHA}  /tmp/apache-maven.tar.gz" | sha256sum -c - \
+  && tar -xzf /tmp/apache-maven.tar.gz -C /usr/share/maven --strip-components=1 \
+  && rm -f /tmp/apache-maven.tar.gz \
+  && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
+
+WORKDIR /usr/src/app
+
+# copy just the pom.xml and install dependencies for caching
+ADD pom.xml .
+RUN mvn verify clean --fail-never
+
+ADD . .
+
+RUN mvn install -DskipTests
+
+FROM openjdk:8u121-jdk-alpine
+
+COPY --from=0 /usr/src/app/target/*.jar .
+
+EXPOSE 8081
+
+CMD java -jar *.jar \
+    --server.port=8081

docker-compose.yml

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+version: "3.2"
+services:
+  api:
+    build: .
+    ports:
+      - "1234:8081"