FEATURE (contribute): Update manuals ho wto contribute

Author: RostislavDugin

docs/how-to-add-notifier.md

@@ -0,0 +1,45 @@
+# How to add new notifier to Postgresus (Discord, Slack, Telegram, Email, Webhook, etc.)
+
+## Backend part
+
+1. Create new model in `backend/internal/features/notifiers/models/{notifier_name}/` folder. Implement `NotificationSender` interface from parent folder.
+   - The model should implement `Send(logger *slog.Logger, heading string, message string) error` and `Validate() error` methods
+   - Use UUID primary key as `NotifierID` that references the main notifiers table
+
+2. Add new notifier type to `backend/internal/features/notifiers/enums.go` in the `NotifierType` constants.
+
+3. Update the main `Notifier` model in `backend/internal/features/notifiers/model.go`:
+   - Add new notifier field with GORM foreign key relation
+   - Update `getSpecificNotifier()` method to handle the new type
+   - Update `Send()` method to route to the new notifier
+
+4. If you need to add some .env variables to test, add them in `backend/internal/config/config.go` (so we can use it in tests)
+
+5. If you need some Docker container to test, add it to `backend/docker-compose.yml.example`. For sensitive data - keep it blank.
+
+6. If you need some sensitive envs to test in pipeline, message @rostislav_dugin so I can add it to GitHub Actions. For example, API keys or credentials.
+
+7. Create new migration in `backend/migrations` folder:
+   - Create table with `notifier_id` as UUID primary key
+   - Add foreign key constraint to `notifiers` table with CASCADE DELETE
+   - Look at existing notifier migrations for reference
+
+8. Make sure that all tests are passing.
+
+## Frontend part
+
+If you are able to develop only backend - it's fine, message @rostislav_dugin so I can complete UI part.
+
+1. Add models and validator to `frontend/src/entity/notifiers/models/{notifier_name}/` folder and update `index.ts` file to include new model exports.
+
+2. Upload an SVG icon to `public/icons/notifiers/`, update `src/entity/notifiers/models/getNotifierLogoFromType.ts` to return new icon path, update `src/entity/notifiers/models/NotifierType.ts` to include new type, and update `src/entity/notifiers/models/getNotifierNameFromType.ts` to return new name.
+
+3. Add UI components to manage your notifier:
+   - `src/features/notifiers/ui/edit/notifiers/Edit{NotifierName}Component.tsx` (for editing)
+   - `src/features/notifiers/ui/show/notifier/Show{NotifierName}Component.tsx` (for display)
+
+4. Update main components to handle the new notifier type:
+   - `EditNotifierComponent.tsx` - add import, validation function, and component rendering
+   - `ShowNotifierComponent.tsx` - add import and component rendering
+
+5. Make sure everything is working as expected.

docs/how-to-add-storage.md

@@ -0,0 +1,51 @@
+# How to add new storage to Postgresus (S3, FTP, Google Drive, NAS, etc.)
+
+## Backend part
+
+1. Create new model in `backend/internal/features/storages/models/{storage_name}/` folder. Implement `StorageFileSaver` interface from parent folder.
+   - The model should implement `SaveFile(logger *slog.Logger, fileID uuid.UUID, file io.Reader) error`, `GetFile(fileID uuid.UUID) (io.ReadCloser, error)`, `DeleteFile(fileID uuid.UUID) error`, `Validate() error`, and `TestConnection() error` methods
+   - Use UUID primary key as `StorageID` that references the main storages table
+   - Add `TableName() string` method to return the proper table name
+
+2. Add new storage type to `backend/internal/features/storages/enums.go` in the `StorageType` constants.
+
+3. Update the main `Storage` model in `backend/internal/features/storages/model.go`:
+   - Add new storage field with GORM foreign key relation
+   - Update `getSpecificStorage()` method to handle the new type
+   - Update `SaveFile()`, `GetFile()`, and `DeleteFile()` methods to route to the new storage
+   - Update `Validate()` method to include new storage validation
+
+4. If you need to add some .env variables to test, add them in `backend/internal/config/config.go` (so we can use it in tests)
+
+5. If you need some Docker container to test, add it to `backend/docker-compose.yml.example`. For sensitive data - keep it blank.
+
+6. If you need some sensitive envs to test in pipeline, message @rostislav_dugin so I can add it to GitHub Actions. For example, Google Drive envs or FTP credentials.
+
+7. Create new migration in `backend/migrations` folder:
+   - Create table with `storage_id` as UUID primary key
+   - Add foreign key constraint to `storages` table with CASCADE DELETE
+   - Look at existing storage migrations for reference
+
+8. Update tests in `backend/internal/features/storages/model_test.go` to test new storage
+
+9. Make sure that all tests are passing.
+
+## Frontend part
+
+If you are able to develop only backend - it's fine, message @rostislav_dugin so I can complete UI part.
+
+1. Add models and api to `frontend/src/entity/storages/models/` folder and update `index.ts` file to include new model exports.
+   - Create TypeScript interface for your storage model
+   - Add validation function if needed
+
+2. Upload an SVG icon to `public/icons/storages/`, update `src/entity/storages/models/getStorageLogoFromType.ts` to return new icon path, update `src/entity/storages/models/StorageType.ts` to include new type, and update `src/entity/storages/models/getStorageNameFromType.ts` to return new name.
+
+3. Add UI components to manage your storage:
+   - `src/features/storages/ui/edit/storages/Edit{StorageName}Component.tsx` (for editing)
+   - `src/features/storages/ui/show/storages/Show{StorageName}Component.tsx` (for display)
+
+4. Update main components to handle the new storage type:
+   - `EditStorageComponent.tsx` - add import and component rendering
+   - `ShowStorageComponent.tsx` - add import and component rendering
+
+5. Make sure everything is working as expected.

frontend/src/entity/notifiers/models/getNotifierNameFromType.ts

@@ -10,6 +10,8 @@ export const getNotifierNameFromType = (type: NotifierType) => {
       return 'Webhook';
     case NotifierType.SLACK:
       return 'Slack';
+    case NotifierType.DISCORD:
+      return 'Discord';
     default:
       return '';
   }