Complete Node.js container implementation with multi-version support

- Add Dockerfile with AlmaLinux 9 base, Nginx reverse proxy, and PM2
- Support Node.js versions 18, 20, 22 with automated installation
- Implement memory-optimized configuration (256MB minimum, 512MB recommended)
- Add Memcached session storage for development environments
- Create comprehensive documentation (README, USER-GUIDE, MEMORY-GUIDE, CLAUDE.md)
- Include example applications (simple website and REST API)
- Add Gitea CI/CD pipeline for automated multi-version builds
- Provide local development script with helper utilities
- Implement health monitoring, log rotation, and backup systems

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,41 @@
+FROM almalinux/9-base
+ARG NODEVER=20
+
+# Install repos, update, install only needed packages, clean up in one layer
+RUN dnf install -y \
+      https://dl.fedoraproject.org/pub/epel/epel-release-latest-9.noarch.rpm && \
+    dnf update -y && \
+    dnf install -y wget procps cronie iproute nginx openssl curl && \
+    dnf clean all && \
+    rm -rf /var/cache/dnf /usr/share/doc /usr/share/man /usr/share/locale/* \
+           /var/cache/yum /tmp/* /var/tmp/*
+
+# Copy scripts into the image and set permissions
+COPY ./scripts/ /scripts/
+RUN chmod +x /scripts/*
+
+# Generate self-signed cert, create needed dirs, install Node.js, clean up
+RUN openssl req -newkey rsa:2048 -nodes -keyout /etc/pki/tls/private/localhost.key -x509 -days 3650 -subj "/CN=localhost" -out /etc/pki/tls/certs/localhost.crt && \
+    mkdir -p /var/log/nodejs && \
+    /scripts/install-node$NODEVER.sh && \
+    rm -rf /tmp/*
+
+# Install PM2 globally for process management with minimal footprint
+RUN npm install -g pm2@latest --production && \
+    npm cache clean --force && \
+    rm -rf /tmp/*
+
+# Copy configs and web files
+COPY ./configs/nginx.conf /etc/nginx/nginx.conf
+COPY ./configs/default.conf /etc/nginx/conf.d/default.conf
+COPY ./configs/index.js /var/www/html/
+COPY ./configs/package.json /var/www/html/
+COPY ./configs/ecosystem.config.js /var/www/html/
+
+# Set up cron job for log rotation
+RUN echo "15 */12 * * * root /scripts/log-rotate.sh" >> /etc/crontab
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=60s --retries=3 \
+  CMD curl -f http://localhost:3000/ping || exit 1
+
+ENTRYPOINT [ "/scripts/entrypoint.sh" ]