Added db configurations and Dockerfile

internal/service/document_service.go

@@ -0,0 +1,41 @@
+package service
+
+import (
+	"errors"
+	"fileserver/config"
+	"fileserver/internal/models"
+	"fmt"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// GetDocument retrieves a document from the database based on its `idFile` field.
+// It searches for a document with the given `idFile` and returns the document if found, or an error if not.
+func GetDocument(idFile uuid.UUID) (*models.Document, error) {
+	var document models.Document
+
+	// Perform the query to find the document by its unique `idFile` field
+	if err := config.DB.Where("id_file = ?", idFile).First(&document).Error; err != nil {
+		// If no record is found, return a descriptive error
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, fmt.Errorf("document with idFile %v not found", idFile)
+		}
+		// If there is another error during retrieval, return the error
+		return nil, fmt.Errorf("error while retrieving document: %v", err)
+	}
+
+	// Return the document found in the database
+	return &document, nil
+}
+
+// AddDocument adds a new document to the database.
+// The function receives a pointer to a `Document` struct and attempts to insert it into the database.
+func AddDocument(document *models.Document) error {
+	// Create a new record for the document in the database
+	if err := config.DB.Create(document).Error; err != nil {
+		// If an error occurs during the insert, return the error
+		return fmt.Errorf("error while adding document: %v", err)
+	}
+	// If the operation is successful, return nil (no error)
+	return nil
+}