feat: add PostgreSQL database support and development scripts

- Added pg and @types/pg dependencies for PostgreSQL integration
- Created database testing and backend initialization scripts
- Changed dev server port to 3002 to avoid conflicts

scripts/init-backend.sh

@@ -0,0 +1,117 @@
+#!/bin/bash
+
+# RepoHub Backend Initialization Script
+# This script sets up the database and initializes the backend
+
+set -e
+
+echo "🚀 Initializing RepoHub Backend..."
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Configuration
+DB_HOST=${DB_HOST:-localhost}
+DB_PORT=${DB_PORT:-5432}
+DB_NAME=${DB_NAME:-repohub}
+DB_USER=${DB_USER:-postgres}
+DB_PASSWORD=${DB_PASSWORD:-postgres}
+
+echo -e "${BLUE}📋 Configuration:${NC}"
+echo "  Host: $DB_HOST"
+echo "  Port: $DB_PORT"
+echo "  Database: $DB_NAME"
+echo "  User: $DB_USER"
+
+# Check if PostgreSQL is running
+echo -e "\n${YELLOW}🔍 Checking PostgreSQL connection...${NC}"
+if ! pg_isready -h $DB_HOST -p $DB_PORT; then
+    echo -e "${RED}❌ PostgreSQL is not running on $DB_HOST:$DB_PORT${NC}"
+    echo "Please start PostgreSQL and try again."
+    exit 1
+fi
+
+echo -e "${GREEN}✅ PostgreSQL is running${NC}"
+
+# Check if database exists
+echo -e "\n${YELLOW}🗄️ Checking database...${NC}"
+if psql -h $DB_HOST -p $DB_PORT -U $DB_USER -lqt | cut -d \| -f 1 | grep -qw $DB_NAME; then
+    echo -e "${GREEN}✅ Database '$DB_NAME' already exists${NC}"
+else
+    echo -e "${YELLOW}⚠️ Database '$DB_NAME' does not exist. Creating...${NC}"
+    createdb -h $DB_HOST -p $DB_PORT -U $DB_USER $DB_NAME
+    echo -e "${GREEN}✅ Database '$DB_NAME' created${NC}"
+fi
+
+# Check if tables exist
+echo -e "\n${YELLOW}📊 Checking database tables...${NC}"
+TABLES_EXIST=$(psql -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME -tAc "SELECT EXISTS (SELECT FROM information_schema.tables WHERE table_schema = 'public' AND table_name = 'platforms');")
+
+if [ "$TABLES_EXIST" = "t" ]; then
+    echo -e "${GREEN}✅ Database tables already exist${NC}"
+    read -p "Do you want to reset the database? This will delete all data. (y/N): " -n 1 -r
+    echo
+    if [[ $REPLY =~ ^[Yy]$ ]]; then
+        echo -e "${YELLOW}🔄 Resetting database...${NC}"
+        psql -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME -f src/lib/database/schema.sql
+        echo -e "${GREEN}✅ Database reset completed${NC}"
+    else
+        echo -e "${BLUE}ℹ️ Keeping existing data${NC}"
+    fi
+else
+    echo -e "${YELLOW}⚠️ Database tables do not exist. Creating schema...${NC}"
+    psql -h $DB_HOST -p $DB_PORT -U $DB_USER -d $DB_NAME -f src/lib/database/schema.sql
+    echo -e "${GREEN}✅ Database schema created${NC}"
+fi
+
+# Check if node_modules exists
+echo -e "\n${YELLOW}📦 Checking dependencies...${NC}"
+if [ ! -d "node_modules" ]; then
+    echo -e "${YELLOW}⚠️ Dependencies not found. Installing...${NC}"
+    pnpm install
+    echo -e "${GREEN}✅ Dependencies installed${NC}"
+else
+    echo -e "${GREEN}✅ Dependencies already exist${NC}"
+fi
+
+# Check if .env file exists
+echo -e "\n${YELLOW}⚙️ Checking environment configuration...${NC}"
+if [ ! -f ".env" ]; then
+    echo -e "${YELLOW}⚠️ .env file not found. Creating from example...${NC}"
+    cp .env.example .env
+    echo -e "${GREEN}✅ .env file created${NC}"
+    echo -e "${YELLOW}⚠️ Please edit .env file with your database credentials${NC}"
+    echo "   Current configuration:"
+    echo "   DB_HOST=$DB_HOST"
+    echo "   DB_PORT=$DB_PORT"
+    echo "   DB_NAME=$DB_NAME"
+    echo "   DB_USER=$DB_USER"
+    echo "   DB_PASSWORD=$DB_PASSWORD"
+else
+    echo -e "${GREEN}✅ .env file already exists${NC}"
+fi
+
+# Test database connection
+echo -e "\n${YELLOW}🔗 Testing database connection...${NC}"
+if pnpm run test:db 2>/dev/null; then
+    echo -e "${GREEN}✅ Database connection successful${NC}"
+else
+    echo -e "${YELLOW}⚠️ Database connection test failed. This is expected if test script doesn't exist yet.${NC}"
+fi
+
+# Display next steps
+echo -e "\n${GREEN}🎉 Backend initialization completed!${NC}"
+echo -e "\n${BLUE}📋 Next steps:${NC}"
+echo "1. Review and update .env file if needed"
+echo "2. Start the development server:"
+echo "   ${YELLOW}pnpm dev${NC}"
+echo "3. Test the API endpoints:"
+echo "   ${YELLOW}curl http://localhost:3000/api/platforms${NC}"
+echo "4. Sync Ubuntu packages:"
+echo "   ${YELLOW}curl -X POST http://localhost:3000/api/sync -H 'Content-Type: application/json' -d '{\"platform_id\": \"ubuntu\"}'${NC}"
+
+echo -e "\n${GREEN}✨ Ready to start development!${NC}"