feat(docker): add split backend/frontend stacks and dynamic versioning

deployment/docker/combined/Dockerfile

@@ -0,0 +1,64 @@
+FROM python:3.11-slim
+
+ARG APP_VERSION=1.1.9
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    APP_VERSION=${APP_VERSION}
+
+# System dependencies required by the backend (SSH, PDF, etc.)
+RUN apt-get update \ 
+    && apt-get install -y --no-install-recommends \ 
+       build-essential \ 
+       curl \ 
+       wget \ 
+       sshpass \ 
+       openssh-client \ 
+       ca-certificates \ 
+       libpango-1.0-0 \ 
+       libpangocairo-1.0-0 \ 
+       libgdk-pixbuf2.0-0 \ 
+       libffi-dev \ 
+       shared-mime-info \ 
+    && rm -rf /var/lib/apt/lists/*
+
+# Create application directories
+RUN mkdir -p /opt/depl0y/backend \ 
+    /opt/depl0y/frontend/dist \ 
+    /var/lib/depl0y/db \ 
+    /var/lib/depl0y/cloud-images \ 
+    /var/lib/depl0y/isos \ 
+    /var/lib/depl0y/ssh_keys \ 
+    /var/lib/depl0y/cloud-init \ 
+    /var/log/depl0y
+
+WORKDIR /opt/depl0y/backend
+
+# Install Python dependencies
+COPY src/backend/requirements.txt /opt/depl0y/backend/requirements.txt
+RUN pip install --no-cache-dir --upgrade pip \ 
+    && pip install --no-cache-dir -r requirements.txt \ 
+    && pip install --no-cache-dir weasyprint markdown requests
+
+# Copy backend code and built frontend assets
+COPY src/backend /opt/depl0y/backend
+COPY src/frontend/dist /opt/depl0y/frontend/dist
+
+# Default environment values (can be overridden at runtime)
+ENV DATABASE_URL=sqlite:////var/lib/depl0y/db/depl0y.db \ 
+    ISO_STORAGE_PATH=/var/lib/depl0y/isos \ 
+    UPLOAD_DIR=/var/lib/depl0y \ 
+    CLOUDINIT_TEMPLATE_PATH=/var/lib/depl0y/cloud-init \ 
+    SSH_KEY_PATH=/var/lib/depl0y/ssh_keys \ 
+    LOG_FILE=/var/log/depl0y/app.log \ 
+    FRONTEND_DIST_PATH=/opt/depl0y/frontend/dist \ 
+    APPLICATION_PORT_INTERNAL=8080
+
+# Entrypoint script
+COPY deployment/docker/combined/docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+
+EXPOSE 8080
+
+ENTRYPOINT ["/usr/local/bin/docker-entrypoint.sh"]
+