Updated docker files and layout

Dockerfile

@@ -1,19 +1,49 @@
-FROM alpine:3.16
+ARG JAVA_VERSION=17
 
-ARG version
+FROM alpine:3.16 AS build
 
-ENV VERSION ${version}
-ENV JAVA_HOME /usr/lib/jvm/java-8
+ARG MAVEN_VERSION=3.8.7
+ARG MAVEN_BASE_URL=https://dlcdn.apache.org/maven/maven-3/${MAVEN_VERSION}/binaries
+ARG USER_HOME_DIR="/root"
+ARG JAVA_VERSION
 
-RUN apk --no-cache add sudo \
-  && apk --no-cache add wget \
-  && apk --no-cache add openjdk8-jre
+RUN apk --no-cache add sudo curl tar bash procps \
+  && apk --no-cache add openjdk${JAVA_VERSION}
+
+RUN mkdir -p /usr/share/maven /usr/share/maven/ref \
+    && echo "Downloading maven" \
+    && curl -fsSL -o /tmp/apache-maven.tar.gz ${MAVEN_BASE_URL}/apache-maven-${MAVEN_VERSION}-bin.tar.gz \
+    && echo "Unzipping maven" \
+    && tar -xzf /tmp/apache-maven.tar.gz -C /usr/share/maven --strip-components=1 \
+    && echo "Cleaning and setting links" \
+    && rm -f /tmp/apache-maven.tar.gz \
+    && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn
+
+ENV MAVEN_HOME /usr/share/maven
+ENV MAVEN_CONFIG "$USER_HOME_DIR/.m2"
+ENV JAVA_VER ${JAVA_VERSION}
+ENV JAVA_HOME /usr/lib/jvm/java-${JAVA_VERSION}-openjdk
 
 WORKDIR /app
-VOLUME /app
+COPY ./src ./src
+COPY ./pom.xml ./pom.xml
+RUN mvn -f ./pom.xml clean package
 
-COPY ./start.sh /app
-COPY ./config.txt /app
-RUN chmod +x /app/start.sh
+FROM alpine:3.16
 
-ENTRYPOINT ["/bin/sh", "-c", "/app/start.sh"]
+ARG JAVA_VERSION
+
+ENV VERSION ${VER}
+ENV JAVA_VER ${JAVA_VERSION}
+ENV JAVA_HOME /usr/lib/jvm/java-${JAVA_VERSION}-openjdk
+
+RUN apk --no-cache add sudo bash \
+  && apk --no-cache add openjdk${JAVA_VERSION}
+
+WORKDIR /app
+COPY --from=build /app/target/siren-*-All.jar /usr/local/lib/siren.jar
+COPY ./start.sh ./start.sh
+RUN chmod +x ./start.sh
+
+ENTRYPOINT ["java", "-jar", "/usr/local/lib/siren.jar"]
+#ENTRYPOINT ["/bin/sh", "-c", "./start.sh"]