Update README.md

Docker distroless example

README.md

@@ -313,3 +313,24 @@ elasticsearch.password=SomePassword
 elasticsearch.required_index_status=YELLOW
 elasticsearch.schema_management_strategy=CREATE
 ```
+
+## Example of a Dockerfile based on distroless images (for lower footprint and improved security)
+
+```code
+FROM maven:3.6.3-jdk-11-slim as build-hapi
+WORKDIR /tmp/hapi-fhir-jpaserver-starter
+
+COPY pom.xml .
+RUN mvn -ntp dependency:go-offline
+
+COPY src/ /tmp/hapi-fhir-jpaserver-starter/src/
+RUN mvn clean package spring-boot:repackage -Pboot
+
+FROM gcr.io/distroless/java:11
+
+COPY --from=build-hapi /tmp/hapi-fhir-jpaserver-starter/target/ROOT.war /app/main.war
+
+EXPOSE 8080
+WORKDIR /app
+CMD ["main.war"]
+```