FEATURE (installation): Add installation script

.gitignore

@@ -1,4 +1,5 @@
 postgresus_data/
 postgresus-data/
 .env
-pgdata/
+pgdata/
+docker-compose.yml

README.md

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+You have 2 ways how to run Postgresus:
+
+# Installation
+
+1) Install Postgresus via script.
+It will:
+- install Docker with Docker Compose
+- write docker-compose.yml config
+- install cron job to start Postgresus on system reboot
+
+
+> apt-get install -y curl
+> curl -sSL https://raw.githubusercontent.com/rostislavdugin/postgresus/main/install-postgresus.sh | bash
+> docker-compose up
+
+2) Write docker-compose.yml config manually:
+
+```
+version: "3"
+
+services:
+  postgresus:
+    image: rostislavdugin/postgresus:latest
+    ports:
+      - "4005:4005"
+
+  postgresus-db:
+    image: postgres:17
+    # we use default values, but do not expose
+    # PostgreSQL ports so it is safe
+    environment:
+      - POSTGRES_DB=postgresus
+      - POSTGRES_USER=postgresus
+      - POSTGRES_PASSWORD=postgresus
+    volumes:
+      - ./pgdata:/var/lib/postgresql/data
+    container_name: postgresus-db
+    command: -p 5437
+    shm_size: 10gb
+```
+
+# Usage
+
+Go to http://localhost:4005 to see Postgresus UI

docker-compose.yml.example

@@ -1,12 +1,20 @@
 version: "3"
 
+# Do not use this file in production or VPS. This
+# file is indended for local development only. To 
+# run on your machine - read README.md
+
 services:
-  postgresus:
+  # For local development only to test build. Do
+  # not use in production or VPS
+  postgresus-local:
     build:
       context: .
       dockerfile: Dockerfile
     ports:
       - "4005:4005"
+    depends_on:
+      - postgresus-db
 
   postgresus-db:
     image: postgres:17

install-postgresus.sh

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+#!/bin/bash
+
+# Set up logging
+LOG_FILE="/var/log/postgresus-install.log"
+INSTALL_DIR="/opt/postgresus"
+
+log() {
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a "$LOG_FILE"
+}
+
+# Create log file if doesn't exist
+touch "$LOG_FILE"
+log "Starting PostgresUS installation..."
+
+# Create installation directory
+log "Creating installation directory..."
+if [ ! -d "$INSTALL_DIR" ]; then
+    mkdir -p "$INSTALL_DIR"
+    log "Created directory: $INSTALL_DIR"
+else
+    log "Directory already exists: $INSTALL_DIR"
+fi
+
+# Check if Docker is installed
+if ! command -v docker &> /dev/null; then
+    log "Docker not found. Installing Docker..."
+    
+    # Install Docker
+    apt-get update
+    apt-get remove -y docker docker-engine docker.io containerd runc
+    apt-get install -y ca-certificates curl gnupg lsb-release
+    mkdir -p /etc/apt/keyrings
+    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+    echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+    apt-get update
+    apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
+    log "Docker installed successfully"
+else
+    log "Docker already installed"
+fi
+
+# Check if docker-compose is installed
+if ! command -v docker-compose &> /dev/null && ! command -v docker compose &> /dev/null; then
+    log "Docker Compose not found. Installing Docker Compose..."
+    apt-get update
+    apt-get install -y docker-compose-plugin
+    log "Docker Compose installed successfully"
+else
+    log "Docker Compose already installed"
+fi
+
+# Write docker-compose.yml
+log "Writing docker-compose.yml to $INSTALL_DIR"
+cat > "$INSTALL_DIR/docker-compose.yml" << 'EOF'
+version: "3"
+
+services:
+  postgresus:
+    image: rostislavdugin/postgresus:latest
+    ports:
+      - "4005:4005"
+
+  postgresus-db:
+    image: postgres:17
+    # we use default values, but do not expose
+    # PostgreSQL ports so it is safe
+    environment:
+      - POSTGRES_DB=postgresus
+      - POSTGRES_USER=postgresus
+      - POSTGRES_PASSWORD=postgresus
+    volumes:
+      - ./pgdata:/var/lib/postgresql/data
+    container_name: postgresus-db
+    command: -p 5437
+    shm_size: 10gb
+EOF
+log "docker-compose.yml created successfully"
+
+# Install cron if not installed
+if ! command -v cron &> /dev/null; then
+    log "Cron not found. Installing cron..."
+    apt-get update
+    apt-get install -y cron
+    systemctl enable cron
+    log "Cron installed successfully"
+else
+    log "Cron already installed"
+fi
+
+# Add cron job for system reboot
+log "Setting up cron job to start PostgresUS on system reboot..."
+CRON_JOB="@reboot cd $INSTALL_DIR && docker-compose up -d >> $INSTALL_DIR/postgresus-startup.log 2>&1"
+(crontab -l 2>/dev/null | grep -v "$INSTALL_DIR.*docker-compose"; echo "$CRON_JOB") | crontab -
+log "Cron job configured successfully"
+
+log "PostgresUS installation completed successfully!"
+log "-------------------------------------------"
+log "To launch immediately:"
+log "> cd $INSTALL_DIR && docker-compose up -d"
+log "Or reboot system to auto-start via cron"
+log "Access PostgresUS at: http://localhost:4005"