build: add docker build script

Dockerfile

@@ -0,0 +1,27 @@
+FROM amazoncorretto:21 AS build
+
+ARG ARTEFACT_VERSION='1.0.0'
+WORKDIR /home/app
+
+COPY gradlew .
+COPY gradle gradle
+COPY build.gradle.kts .
+COPY settings.gradle.kts .
+COPY gradle/libs.versions.toml gradle/libs.versions.toml
+
+RUN chmod +x gradlew && ./gradlew dependencies --no-daemon
+
+COPY src src
+RUN ./gradlew -PartefactVersion=${ARTEFACT_VERSION} bootJar --no-daemon
+
+FROM amazoncorretto:21-alpine
+
+WORKDIR /app
+
+COPY --from=build /home/app/build/libs/helix-server-${ARTEFACT_VERSION}.jar app.jar
+
+EXPOSE 8080
+
+ENV JAVA_OPTS="-XX:+UseContainerSupport -XX:MaxRAMPercentage=75.0"
+
+ENTRYPOINT ["sh", "-c", "java $JAVA_OPTS -jar app.jar"]