feat(backend): complete PostgreSQL-only database migration

Author: Lasim

README.md

@@ -200,6 +200,7 @@ VS Code → HTTPS Request → DeployStack Satellite → MCP Server Process → E
 - **[Done]** Integrated OAuth for secure logins (e.g., GitHub)
 - **[Done]** Created the initial MCP Server Catalog for tool discovery
 - **[Done]** Established documentation and self-hosted Docker support
+- **[Done]** PostgreSQL-only database architecture - migrated from multi-database support (SQLite/Turso/PostgreSQL) to PostgreSQL-only for simplified maintenance and enterprise scalability
 
 ### **Phase 2: Enterprise Governance** (Completed)
 
@@ -221,7 +222,7 @@ VS Code → HTTPS Request → DeployStack Satellite → MCP Server Process → E
 - **[Done]** **Public Launch** - production satellite for community use
 - **[Done]** **Resource Management** - process isolation (remote MCP) and limits
 - **[Done]** **GitHub README and Stars Integration** - automatic GitHub data fetching, secure storage, XSS prevention, DoS protection, and audit logging for MCP server catalog enhancement
-- **[Done]** **Background Job Queue System** - complete 4-phase custom SQLite-based job queue with worker infrastructure, admin API, frontend monitoring UI, and documentation for long-running tasks
+- **[Done]** **Background Job Queue System** - complete 4-phase custom PostgreSQL-based job queue with worker infrastructure, admin API, frontend monitoring UI, and documentation for long-running tasks
 - **[Done]** **Cron Job Scheduling System** - recurring task scheduler using node-cron with integration into the job queue system, standard cron expression support, automatic lifecycle management, and complete separation of scheduling logic from execution for reliability and monitoring
 - **[Done]** **Frontend Syntax Highlighting** - reusable CodeHighlight component with Prism.js for JSON, JavaScript, TypeScript, Bash, and YAML code blocks
 - **[Done]** **Resource Management** - process isolation (stdio) and limits
@@ -264,6 +265,7 @@ VS Code → HTTPS Request → DeployStack Satellite → MCP Server Process → E
 - **[Done]** **Satellite Backend Events System** - real-time event processing with convention-based auto-discovery handler pattern, batch processing (1-100 events), partial success handling, JSON schema validation per event type, and extensible architecture supporting MCP client connections, tool executions, server crashes, and custom event types
 - **[Done]** **MCP Client Activity Tracking** - personal dashboard feature tracking active MCP clients per user across all components (backend database with mcpClientActivity table, satellite in-memory tracker with 30-second background job reporting via event system, dashboard API endpoint with dual authentication and pagination, client name detection from OAuth/headers/user-agent)
 - **[Done]** **Time-Series Metrics System** - production-ready metrics infrastructure with 15-minute bucket aggregation, 3-day retention, automated cleanup
+- **[Done]** **PostgreSQL-Only Database Architecture** - complete migration to PostgreSQL with simplified schema management, environment-based configuration, streamlined migration system, and production-ready setup for enterprise scalability
 
 ### **Phase 7: Enterprise Features** (Future)
 

docker-compose.yml

@@ -1,6 +1,27 @@
 version: '3.8'
 
 services:
+  postgres:
+    image: postgres:18-alpine
+    container_name: deploystack-postgres
+    environment:
+      - POSTGRES_DB=deploystack
+      - POSTGRES_USER=deploystack
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-deploystack}
+    ports:
+      - "5432:5432"
+    volumes:
+      - deploystack_postgres_data:/var/lib/postgresql/data
+    networks:
+      - deploystack-network
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U deploystack -d deploystack"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+
   backend:
     image: deploystack/backend:latest
     container_name: deploystack-backend
@@ -11,11 +32,20 @@ services:
       - PORT=3000
       - DEPLOYSTACK_FRONTEND_URL=http://localhost:8080
       - DEPLOYSTACK_ENCRYPTION_SECRET=${DEPLOYSTACK_ENCRYPTION_SECRET}
+      - POSTGRES_HOST=postgres
+      - POSTGRES_PORT=5432
+      - POSTGRES_DATABASE=deploystack
+      - POSTGRES_USER=deploystack
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-deploystack}
+      - POSTGRES_SSL=false
     volumes:
       - deploystack_backend_persistent:/app/persistent_data
     networks:
       - deploystack-network
     restart: unless-stopped
+    depends_on:
+      postgres:
+        condition: service_healthy
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:3000/"]
       interval: 30s
@@ -39,6 +69,8 @@ services:
         condition: service_healthy
 
 volumes:
+  deploystack_postgres_data:
+    driver: local
   deploystack_backend_persistent:
     driver: local