change base image to Alpine

- change image to security patched Java Alpine;
- add Makefile and .env for easier build and release

.env

@@ -0,0 +1,3 @@
+IMAGE_VERSION=2.22.4
+GS_VERSION=2.22.4
+TOMCAT_VERSION=9.0.78

Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:22.04 as tomcat
+FROM lapierre/java-alpine:11 as tomcat
 
 ARG TOMCAT_VERSION=9.0.75
 ARG CORS_ENABLED=false
@@ -26,27 +26,18 @@ ENV CATALINA_OPTS="\$EXTRA_JAVA_OPTS \
     -Dsun.java2d.renderer=sun.java2d.marlin.DMarlinRenderingEngine \
     -Dorg.geotools.coverage.jaiext.enabled=true"
 
-# init
-RUN apt update \
-&& apt -y upgrade \
-&& apt install -y --no-install-recommends openssl unzip gdal-bin wget curl openjdk-11-jdk \
-&& apt clean \
-&& rm -rf /var/cache/apt/* \
-&& rm -rf /var/lib/apt/lists/*
-
 WORKDIR /opt/
 
 RUN wget -q https://archive.apache.org/dist/tomcat/tomcat-9/v${TOMCAT_VERSION}/bin/apache-tomcat-${TOMCAT_VERSION}.tar.gz \
-&& tar xf apache-tomcat-${TOMCAT_VERSION}.tar.gz \
-&& rm apache-tomcat-${TOMCAT_VERSION}.tar.gz \
-&& rm -rf /opt/apache-tomcat-${TOMCAT_VERSION}/webapps/ROOT \
-&& rm -rf /opt/apache-tomcat-${TOMCAT_VERSION}/webapps/docs \
-&& rm -rf /opt/apache-tomcat-${TOMCAT_VERSION}/webapps/examples
+    && tar xf apache-tomcat-${TOMCAT_VERSION}.tar.gz \
+    && rm apache-tomcat-${TOMCAT_VERSION}.tar.gz \
+    && rm -rf /opt/apache-tomcat-${TOMCAT_VERSION}/webapps/ROOT \
+    && rm -rf /opt/apache-tomcat-${TOMCAT_VERSION}/webapps/docs \
+    && rm -rf /opt/apache-tomcat-${TOMCAT_VERSION}/webapps/examples \
+    && ln -s $CATALINA_HOME /opt/apache-tomcat
 
 # cleanup
-RUN apt purge -y  \
-&& apt autoremove --purge -y \
-&& rm -rf /tmp/*
+RUN rm -rf /tmp/*
 
 FROM tomcat as download
 
@@ -59,10 +50,10 @@ ENV GEOSERVER_BUILD=$GS_BUILD
 WORKDIR /tmp
 
 RUN echo "Downloading GeoServer ${GS_VERSION} ${GS_BUILD}" \
-&& wget -q -O /tmp/geoserver.zip $WAR_ZIP_URL \
-&& unzip geoserver.zip geoserver.war -d /tmp/ \
-&& unzip -q /tmp/geoserver.war -d /tmp/geoserver \
-&& rm /tmp/geoserver.war
+    && wget -q -O /tmp/geoserver.zip $WAR_ZIP_URL \
+    && unzip geoserver.zip geoserver.war -d /tmp/ \
+    && unzip -q /tmp/geoserver.war -d /tmp/geoserver \
+    && rm /tmp/geoserver.war
 
 FROM tomcat as install
 
@@ -98,7 +89,7 @@ RUN echo "Installing GeoServer $GS_VERSION $GS_BUILD"
 COPY --from=download /tmp/geoserver $CATALINA_HOME/webapps/geoserver
 
 RUN mv $CATALINA_HOME/webapps/geoserver/WEB-INF/lib/marlin-*.jar $CATALINA_HOME/lib/marlin.jar \
-&& mkdir -p $GEOSERVER_DATA_DIR
+  && mkdir -p $GEOSERVER_DATA_DIR
 
 COPY $GS_DATA_PATH $GEOSERVER_DATA_DIR
 COPY $ADDITIONAL_LIBS_PATH $GEOSERVER_LIB_DIR

Makefile

@@ -0,0 +1,11 @@
+include .env
+
+IMAGE_NAME=geoserver-docker.osgeo.org/geoserver
+
+docker:
+	docker build --build-arg CORS_ALLOWED_METHODS=GET,POST,PUT,HEAD,OPTIONS --build-arg CORS_ENABLED=true --build-arg GS_VERSION=$(GS_VERSION) --build-arg TOMCAT_VERSION=$(TOMCAT_VERSION) --pull -t $(IMAGE_NAME):$(IMAGE_VERSION) .
+	docker tag $(IMAGE_NAME):$(IMAGE_VERSION) $(IMAGE_NAME):latest
+push:
+	docker push $(IMAGE_NAME):$(IMAGE_VERSION)
+	docker push $(IMAGE_NAME):latest
+

docker-compose-demo.yml

@@ -4,11 +4,11 @@ services:
     build:
       context: .
       args:
-        - GEOSERVER_VERSION=2.22.0
+        - GEOSERVER_VERSION=${GS_VERSION}
         - CORS_ENABLED=true
         - CORS_ALLOWED_METHODS=GET,POST,PUT,HEAD,OPTIONS
     ports:
-      - 80:8080
+      - "80:8080"
     environment:
       - INSTALL_EXTENSIONS=true
       - STABLE_EXTENSIONS=wps,csw