Base the docker image on alpine directly

From the OpenJDK team:

> The OpenJDK port for Alpine is not in a supported release by OpenJDK, since it is not in the mainline code base. It is only available as early access builds of OpenJDK Project Portola. See also [this comment](docker-library/openjdk#235 (comment)). So this image follows what is available from the OpenJDK project's maintainers.
>
> What this means is that Alpine based images are only released for early access release versions of OpenJDK. Once a particular release becomes a "General-Availability" release, the Alpine version is dropped from the "Supported Tags"; they are still available to pull, but will no longer be updated.

Dockerfile

@@ -1,8 +1,17 @@
-FROM openjdk:8-jdk-alpine
+FROM alpine:3.13
 
-ENV JAVA_OPTS=""
+LABEL maintainer="VLINGO XOOM Team <info@vlingo.io>"
+
+ENV JAVA_HOME=/usr/lib/jvm/default-jvm/
+ENV PATH=${JAVA_HOME}/bin:$PATH
 ENV XOOM_ENV="env"
 
-ADD ./target/xoom-schemata-*-jar-with-dependencies.jar /app.jar
+ADD ./target/xoom-schemata-*-jar-with-dependencies.jar /schemata/xoom-schemata.jar
+
+RUN addgroup -S xoom && adduser -S -D -s /sbin/nologin -h /schemata -G xoom xoom \
+ && apk add --no-cache bash openjdk8 \
+ && chown -R xoom:xoom /schemata
 
-ENTRYPOINT exec java $JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -jar /app.jar $XOOM_ENV
+WORKDIR /schemata
+CMD java -jar /schemata/xoom-schemata.jar $XOOM_ENV
+USER xoom

README.md

@@ -12,6 +12,17 @@ The VLINGO XOOM Schema Registry.
 
 ## Quick Start
 
+### Docker
+
+The quickest way to run XOOM Schemata is to use the [docker image](https://hub.docker.com/r/vlingo/xoom-schemata)
+published by the VLINGO XOOM Team:
+
+```bash
+docker run -it --rm -eXOOM_ENV=dev -p '9019:9019' vlingo/xoom-schemata
+```
+
+### Maven
+
 :warning: Make sure you are using a Java 8 JDK.
 
 Build <pre><code>& "<b>{yourInstallPath}</b>\xoom-schemata\mvnw.cmd" clean package -Pfrontend -f "<b>{yourInstallPath}</b>\xoom-schemata\pom.xml"</code></pre>
@@ -40,9 +51,9 @@ The maven build takes care of the following:
 * Run the UI build (`npm run export` in `src/main/frontend`) [Maven Profile 'frontend']
 * Package the backend, frontend and dependencies within a fat jar
 
-#### Docker Build:
-After building, you can optionally build the docker container with `docker build . -t vlingo/xoom-schemata`.
+#### Docker Build
 
+After building, you can optionally build the docker container with `docker build . -t vlingo/xoom-schemata`.
 
 ### Run