Refactor Dockerfile and CI Configuration

- Updated the CI configuration in .drone.yml to use the new Dockerfile located at ./cmd/web/Dockerfile.
- Removed the old Dockerfile and Dockerfile-drone as they are no longer needed.
- Refactored the cmd/web/Dockerfile to streamline the build process and improve organization.
- Introduced a new bootstrap package to handle application initialization, including configuration, logging, MongoDB, Redis, and authorization service setup.
- Added a health check endpoint for monitoring the server status, enhancing the API's operational capabilities.

cmd/web/bootstrap/health.go

@@ -0,0 +1,35 @@
+package bootstrap
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/labstack/echo/v4"
+)
+
+// @Summary Health check endpoint
+// @Description Get comprehensive server health status including system information, dependencies status, and performance metrics. This endpoint is used for monitoring and load balancer health checks.
+// @Tags Admin-Health
+// @Accept json
+// @Produce json
+// @Success 200 {object} HealthResponse "System is healthy and operational"
+// @Failure 503 {object} HealthResponse "System is unhealthy or experiencing issues"
+// @Router /admin/v1/health [get]
+func healthHandler(c echo.Context) error {
+	return c.JSON(http.StatusOK, HealthResponse{
+		Status:  "healthy",
+		Time:    time.Now().Unix(),
+		Version: "2.0.0",
+		Service: "tender-management-api",
+		Uptime:  time.Since(time.Now()).String(),
+	})
+}
+
+// HealthResponse represents the comprehensive health check response
+type HealthResponse struct {
+	Status  string `json:"status" example:"healthy"`                // Current health status
+	Time    int64  `json:"time" example:"1699123456"`               // Current Unix timestamp
+	Version string `json:"version" example:"2.0.0"`                 // API version
+	Service string `json:"service" example:"tender-management-api"` // Service name
+	Uptime  string `json:"uptime,omitempty" example:"24h30m15s"`    // Service uptime duration
+}