chore(config): remove dragonflydb and update deployment documentation

Remove all references to DragonflyDB from the codebase, environment templates, and documentation following its removal from the service architecture. This includes cleaning up Docker configurations, CI/CD workflows, and production guides.

- **Cleanup**: Deleted `dragonfly.conf` and removed DragonflyDB service from `docker-compose.yml`.
- **Environment**: Removed `DRAGONFLY_PASSWORD` and `DRAGONFLY_ADDR` from `.env.example` and `docker-entrypoint.sh`.
- **Documentation**: Updated `README.md`, `PRODUCTION_DEPLOYMENT.md`, and `QUICK_START_PRODUCTION.md` to reflect a 2-service architecture (Trackeep + Postgres).
- **CI/CD**: Updated GitHub Actions to use Go 1.25.
- **Testing**: Updated `test-production.sh` to remove DragonflyDB variable validation.

README.md

@@ -42,12 +42,11 @@ docker run -d \
   -e DB_PASSWORD=your_password \
   -e DB_USER=trackeep \
   -e DB_NAME=trackeep \
-  -e DRAGONFLY_PASSWORD=your_dragonfly_password \
   -e JWT_SECRET=your_jwt_secret \
   ghcr.io/dvorinka/trackeep:latest
 ```
 
-**Note**: This requires external PostgreSQL and DragonflyDB services. For full deployment with included databases, use Docker Compose below.
+**Note**: This requires an external PostgreSQL database. For a complete deployment with the database included, use Docker Compose below.
 
 ### Production Deployment with Docker Compose
 
@@ -77,7 +76,6 @@ services:
       - BACKEND_PORT=8080
       - DB_HOST=postgres
       - DB_PORT=5432
-      - DRAGONFLY_ADDR=dragonfly:6379
       - GIN_MODE=release
     volumes:
       - ./uploads:/app/uploads
@@ -86,8 +84,6 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
-      dragonfly:
-        condition: service_healthy
 
   postgres:
     image: postgres:15-alpine
@@ -95,8 +91,6 @@ services:
       POSTGRES_DB: ${DB_NAME:-trackeep}
       POSTGRES_USER: ${DB_USER:-trackeep}
       POSTGRES_PASSWORD: ${DB_PASSWORD}
-    ports:
-      - "${DB_HOST_PORT:-5433}:5432"
     volumes:
       - postgres_data:/var/lib/postgresql/data
     restart: unless-stopped
@@ -107,31 +101,13 @@ services:
       retries: 5
       start_period: 30s
 
-  dragonfly:
-    image: ghcr.io/dragonflydb/dragonfly:latest
-    ports:
-      - "${DRAGONFLY_HOST_PORT:-6380}:6379"
-    volumes:
-      - dragonfly_data:/data
-    command: dragonfly --requirepass=${DRAGONFLY_PASSWORD} --proactor_threads=2
-    environment:
-      - DRAGONFLY_PASSWORD=${DRAGONFLY_PASSWORD}
-    restart: unless-stopped
-    healthcheck:
-      test: ["CMD-SHELL", "redis-cli -a ${DRAGONFLY_PASSWORD} ping"]
-      interval: 10s
-      timeout: 5s
-      retries: 5
-      start_period: 30s
-
 volumes:
   postgres_data:
-  dragonfly_data:
 ```
 
 ### Service Architecture
 
-Trackeep deployment consists of **3 services**:
+Trackeep deployment consists of **2 services**:
 
 #### **🎯 Trackeep Service (Unified)**
 - **Image**: Built from unified Dockerfile (frontend + backend in one)
@@ -142,18 +118,10 @@ Trackeep deployment consists of **3 services**:
 
 #### **🗄️ Database Service**
 - **Image**: `postgres:15-alpine`
-- **Ports**: `${DB_HOST_PORT:-5433}:5432`
 - **Purpose**: Data persistence and storage
 - **Health**: PostgreSQL readiness check
 - **Storage**: Persistent volume for data
 
-#### **🐉 DragonflyDB Service**
-- **Image**: `ghcr.io/dragonflydb/dragonfly:latest`
-- **Ports**: `${DRAGONFLY_HOST_PORT:-6380}:6379`
-- **Purpose**: In-memory caching and session storage
-- **Health**: Redis-cli ping check
-- **Storage**: Persistent volume for cache data
-
 ### Required Environment Variables
 
 Create a `.env` file from the provided `.env.example` and configure these required variables:
@@ -167,9 +135,6 @@ DB_PASSWORD=your_secure_password_here
 DB_USER=trackeep
 DB_NAME=trackeep
 
-# DragonflyDB Configuration
-DRAGONFLY_PASSWORD=your_dragonfly_password_here
-
 # JWT Secret (generate with: openssl rand -hex 32)
 JWT_SECRET=your_jwt_secret_here_64_hex_characters_long_exactly
 ```
@@ -535,9 +500,6 @@ DB_PASSWORD=your_secure_password_here
 DB_USER=trackeep
 DB_NAME=trackeep
 
-# DragonflyDB Configuration
-DRAGONFLY_PASSWORD=your_dragonfly_password_here
-
 # JWT Configuration (generate with: openssl rand -hex 32)
 JWT_SECRET=your_jwt_secret_here_64_hex_characters_long_exactly
 ```