Add deployment docker compose to VPS

[gavlyukovskiy]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces a deployment configuration for running the application on a VPS using Docker Compose, replacing the previous Digital Ocean App Platform deployment approach. The changes update port configurations and add a complete deployment setup with Nginx as a reverse proxy.

• Removes Digital Ocean-specific deployment workflows and configurations
• Adds a new deployment directory with Docker Compose setup including Nginx reverse proxy, automatic updates via Watchtower
• Updates port mappings from 80 to 3000 for the frontend across development and deployment configurations

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
frontend/Dockerfile	Updates exposed port from 80 to 3000
docker-compose.yaml	Updates Postgres to version 18, changes frontend port mapping to 3000, removes backend service
deployment/nginx.conf	Adds Nginx configuration for reverse proxy routing
deployment/docker-compose.yaml	Adds complete deployment setup with all services
deployment/README.md	Adds deployment instructions for VPS setup
README.md	Updates documentation to reflect new port and deployment approach
.github/workflows/on-release-tag.yml	Removes automated deployment step
.github/workflows/deploy-to-digital-ocean.yml	Removes entire Digital Ocean deployment workflow

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