Consolidate image and update healthcheck

Dockerfile

@@ -1,36 +1,34 @@
-FROM azul/zulu-openjdk:11-jre-headless AS installer
+FROM azul/zulu-openjdk:11-jre-headless
 
-ARG AEMC_VERSION=2.0.3
 ARG TARGETOS=linux
 ARG TARGETARCH=amd64
 
-RUN apt-get update &&\
-  apt-get install -y --no-install-recommends curl
-
-RUN curl -L https://github.com/wttech/aemc/releases/download/v${AEMC_VERSION}/aemc-cli_${TARGETOS}_${TARGETARCH}.tar.gz | tar -xz -C /usr/local/bin
-
-FROM azul/zulu-openjdk:11-jre-headless
-
+ARG AEMC_VERSION=2.0.3
 ARG RUNMODE=author
 ARG PORT=4502
 
 ENV RUNMODE=${RUNMODE}
+ENV PORT=${PORT}
 ENV AEM_VENDOR_JAVA_HOME_DIR=$JAVA_HOME
 
-COPY --from=installer /usr/local/bin/aem /usr/local/bin/aem
-
 EXPOSE ${PORT}
 
 WORKDIR /opt
 
+RUN apt-get update &&\
+  apt-get install -y --no-install-recommends curl &&\
+  apt-get clean &&\
+  rm -rf /var/cache/apk/* &&\
+  curl -L https://github.com/wttech/aemc/releases/download/v${AEMC_VERSION}/aemc-cli_${TARGETOS}_${TARGETARCH}.tar.gz | tar -xz -C /usr/local/bin
+
 COPY aem-sdk-artifacts/aem-sdk-*.zip aem/home/lib/
 COPY aem/default/etc/aem.yml aem/default/etc/aem.yml
 
 RUN aem instance --instance-${RUNMODE} launch && aem instance down
 
-HEALTHCHECK CMD /usr/local/bin/aem instance --instance-${RUNMODE} await
-
 COPY aem-start.sh /usr/local/bin/aem-start
 RUN chmod +x /usr/local/bin/aem-start
 
+HEALTHCHECK CMD /usr/bin/curl -f http://localhost:${PORT}/systemready
+
 CMD ["/usr/local/bin/aem-start"]