Update package build process, add .env template, and update to Cloudron base 5.0.0

Dockerfile

@@ -1,6 +1,6 @@
-FROM cloudron/base:4.0.0
+FROM cloudron/base:5.0.0
 
-# Install dependencies and OpenJDK 17
+# Install dependencies
 RUN apt-get update && \
     apt-get install -y software-properties-common && \
     add-apt-repository -y ppa:openjdk-r/ppa && \
@@ -18,7 +18,7 @@ RUN apt-get update && \
     dnsutils \
     openjdk-17-jdk
 
-# Set environment variables
+# Set Elasticsearch version
 ENV ELASTIC_VERSION=8.17.3
 ENV JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
 
@@ -33,7 +33,7 @@ RUN mkdir -p /usr/share/elasticsearch && \
     mv /usr/share/elasticsearch-${ELASTIC_VERSION}/* /usr/share/elasticsearch/ && \
     rm -rf /usr/share/elasticsearch-${ELASTIC_VERSION} elasticsearch-${ELASTIC_VERSION}-linux-x86_64.tar.gz
 
-# Create necessary directories for data and configuration
+# Create necessary directories
 RUN mkdir -p /app/data/{elasticsearch,logs,config,secrets,jdk/bin,run} && \
     chown -R elasticsearch:elasticsearch /app/data
 
@@ -41,10 +41,13 @@ RUN mkdir -p /app/data/{elasticsearch,logs,config,secrets,jdk/bin,run} && \
 COPY elasticsearch.yml /app/elasticsearch.yml
 COPY start.sh /app/start.sh
 COPY stop.sh /app/stop.sh
+
+# Set permissions
 RUN chmod +x /app/start.sh /app/stop.sh
 
-# Add healthcheck
+# Health check
 HEALTHCHECK --interval=15s --timeout=10s --start-period=120s --retries=5 \
     CMD curl -fs -u elastic:$(cat /app/data/secrets/elastic_password) http://localhost:9200/_cluster/health?pretty || exit 1
 
+# Command to run
 CMD ["/app/start.sh"]