Add code from PR amitshekhariitbhu#11 - Add linter config file add description

Author: Yuri-SN

.golangci.yml

@@ -0,0 +1,59 @@
+linters-settings:
+  errcheck:
+    check-type-assertions: true
+  goconst:
+    min-len: 2
+    min-occurrences: 3
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      - experimental
+      - opinionated
+      - performance
+      - style
+  govet:
+    check-shadowing: false
+  nolintlint:
+    require-explanation: true
+    require-specific: true
+
+linters:
+  disable-all: true
+  enable:
+    - bodyclose
+    - deadcode
+    - depguard
+    - dogsled
+    - dupl
+    - errcheck
+    - exportloopref
+    - exhaustive
+    - gocritic
+    - gofmt
+    - goimports
+    - gocyclo
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - nolintlint
+    - nakedret
+    - prealloc
+    - predeclared
+    - revive
+    - staticcheck
+    - structcheck
+    - stylecheck
+    - thelper
+    - tparallel
+    - typecheck
+    - unconvert
+    - unparam
+    - varcheck
+    - whitespace
+    - goconst
+    - wsl
+    - misspell
+
+run:
+  issues-exit-code: 1

README.md

@@ -312,6 +312,15 @@ Whenever you make changes in the interfaces of these use-cases, repositories, or
   }
   ```
 
+### Linter "must have"
+[How to](https://golangci-lint.run/usage/install/) install golangci-lint. His project [main](https://golangci-lint.run/) page. Default config [file](.golangci.yml).
+Add to IDE:
+- Goland [plugin](https://github.com/xxpxxxxp/intellij-plugin-golangci-lint)
+- vscode (ctrl+shift+p -> settings.json):
+```json
+"go.lintTool": "golangci-lint",
+```
+
 ### TODO
 
 - Improvement based on feedback.