Refactor deployment process to use prebuilt Docker images

Replaced local builds with prebuilt backend and frontend Docker images for simplified deployment. Updated documentation and Makefile to reflect the changes and added a bootstrap script for quick setup of deployment files. Removed deprecated `VITE_API_URL` variable and references to streamline the setup.

README.md

@@ -9,7 +9,7 @@ It combines FastAPI, React, and PostgreSQL in a Docker Compose stack with RBAC,
 
 ## Table of Contents
 
-- [Quick Start](#quick-start)
+- [Quick Deploy (Prebuilt Images)](#quick-deploy-prebuilt-images)
 - [Prerequisites](#prerequisites)
 - [Make Commands](#make-commands)
 - [Configuration Reference (`.env`)](#configuration-reference-env)
@@ -93,27 +93,50 @@ Optional:
 
 - `psql` for manual DB checks
 
-## Quick Start
+## Quick Deploy (Prebuilt Images)
 
-1. Copy environment template:
+If you only want to run NexaPG from published Docker Hub images, use the bootstrap script:
 
 ```bash
-cp .env.example .env
+mkdir -p /opt/NexaPG
+cd /opt/NexaPG
+wget -O bootstrap-compose.sh https://git.nesterovic.cc/nessi/NexaPG/raw/branch/main/ops/scripts/bootstrap-compose.sh
+chmod +x bootstrap-compose.sh
+./bootstrap-compose.sh
 ```
 
-2. Generate a Fernet key and set `ENCRYPTION_KEY` in `.env`:
+This downloads:
+
+- `docker-compose.yml`
+- `.env.example`
+- `Makefile`
+
+Then:
 
 ```bash
+# generate JWT secret
+python -c "import secrets; print(secrets.token_urlsafe(64))"
+# generate Fernet encryption key
 python -c "from cryptography.fernet import Fernet; print(Fernet.generate_key().decode())"
-```
-
-3. Start the stack:
-
-```bash
+# put both values into .env (JWT_SECRET_KEY / ENCRYPTION_KEY)
+# note: .env is auto-created by bootstrap if it does not exist
 make up
 ```
 
-4. Open the application:
+Manual download alternative:
+
+```bash
+mkdir -p /opt/NexaPG
+cd /opt/NexaPG
+wget https://git.nesterovic.cc/nessi/NexaPG/raw/branch/main/docker-compose.yml
+wget https://git.nesterovic.cc/nessi/NexaPG/raw/branch/main/.env.example
+wget https://git.nesterovic.cc/nessi/NexaPG/raw/branch/main/Makefile
+cp .env.example .env
+```
+
+`make up` pulls `nesterovicit/nexapg-backend:latest` and `nesterovicit/nexapg-frontend:latest`, then starts the stack.
+
+Open the application:
 
 - Frontend: `http://<SERVER_IP>:<FRONTEND_PORT>`
 - API base: `http://<SERVER_IP>:<BACKEND_PORT>/api/v1`
@@ -127,7 +150,7 @@ Initial admin bootstrap user (created from `.env` if missing):
 ## Make Commands
 
 ```bash
-make up        # build and start all services
+make up        # pull latest images and start all services
 make down      # stop all services
 make logs      # follow compose logs
 make migrate   # optional/manual: run alembic upgrade head in backend container
@@ -183,12 +206,6 @@ Note: Migrations run automatically when the backend container starts (`entrypoin
 | Variable | Description |
 |---|---|
 | `FRONTEND_PORT` | Host port mapped to frontend container port `80` |
-| `VITE_API_URL` | Frontend API base URL (build-time) |
-
-Recommended values for `VITE_API_URL`:
-
-- Reverse proxy setup: `/api/v1`
-- Direct backend access: `http://<SERVER_IP>:<BACKEND_PORT>/api/v1`
 
 ## Core Functional Areas
 
@@ -318,7 +335,7 @@ For production, serve frontend and API under the same public origin via reverse
 
 - Frontend URL example: `https://monitor.example.com`
 - Proxy API path `/api/` to backend service
-- Use `VITE_API_URL=/api/v1`
+- Route `/api/v1` to the backend service
 
 This prevents mixed-content and CORS issues.
 
@@ -351,8 +368,7 @@ docker compose logs --tail=200 db
 
 ### CORS or mixed-content issues behind SSL proxy
 
-- Set `VITE_API_URL=/api/v1`
-- Ensure proxy forwards `/api/` to backend
+- Ensure proxy forwards `/api/` (or `/api/v1`) to backend
 - Set correct frontend origin(s) in `CORS_ORIGINS`
 
 ### `rejected SSL upgrade` for a target