feat: add deployment guide, backup functionality, and cron jobs for automated backups

Dockerfile.dev

@@ -5,8 +5,8 @@ FROM node:22.11.0
 ENV TZ=Europe/Warsaw
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
-# Install git for development
-RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+# Install git and cron for development
+RUN apt-get update && apt-get install -y git cron && rm -rf /var/lib/apt/lists/*
 
 # Set the working directory
 WORKDIR /app