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.

docker-compose.yml

@@ -1,14 +1,31 @@
 icon: https://github.com/Dvorinka/Trackeep/raw/main/trackeepfavi_bg.png
 
 services:
+  trackeep:
+    image: ghcr.io/dvorinka/trackeep:latest
+    ports:
+      - "${HOST_PORT:-8080}:8080"
+    env_file:
+      - .env
+    environment:
+      - BACKEND_PORT=8080
+      - DB_HOST=postgres
+      - DB_PORT=5432
+      - GIN_MODE=release
+    volumes:
+      - ./uploads:/app/uploads
+      - ./data:/data
+    restart: unless-stopped
+    depends_on:
+      postgres:
+        condition: service_healthy
+
   postgres:
     image: postgres:15-alpine
     environment:
       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
@@ -19,47 +36,5 @@ 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 ${DRAGONFLY_PASSWORD} ping"]
-      interval: 10s
-      timeout: 5s
-      retries: 5
-      start_period: 30s
-
-  trackeep:
-    build:
-      context: .
-      dockerfile: Dockerfile
-    ports:
-      - "${HOST_PORT:-8080}:8080"
-    env_file:
-      - .env
-    environment:
-      - BACKEND_PORT=8080
-      - DB_HOST=postgres
-      - DB_PORT=5432
-      - DRAGONFLY_ADDR=dragonfly:6379
-      - GIN_MODE=release
-    volumes:
-      - ./uploads:/app/uploads
-      - ./data:/data
-    restart: unless-stopped
-    depends_on:
-      postgres:
-        condition: service_healthy
-      dragonfly:
-        condition: service_healthy
-
 volumes:
   postgres_data:
-  dragonfly_data: