fixed lint and improved readme file

.gitignore

@@ -1,5 +1,5 @@
 .idea
 .mem/*.json
-unit_coverage.out
 shortly
 dist/
+*.out

Makefile

@@ -4,4 +4,8 @@ lint:
 
 .PHONY: unit-test
 unit-test:
-	go test -v ./... -coverprofile=unit_coverage.out -short -tags=unit
+	go test -v ./... -coverprofile=unit_coverage.out -short -tags=unit
+
+.PHONY: run
+run:
+	go run .

README.md

@@ -1,6 +1,8 @@
 # Shortly
 ___
 
+Shortly is a URL shortener service.
+
 ## Required
 Go version ``1.17.2``
 
@@ -17,12 +19,26 @@ go build .
 ```shell
 go run .
 ```
+```shell
+make run
+```
+
+## Test
+```shell
+go test -v ./... -tags=unit
+```
+```shell
+make unit-test
+```
 
 ## Code Quality
 #### Run lint
 ```shell
 golangci-lint run -c .golangci.yml -v
 ```
+```shell
+make lint
+```
 
 ## Dockerize
 #### Build
@@ -34,24 +50,48 @@ docker build -t shortly .
 docker run -p 6161:6161 shortly
 ```
 
+## Kubernetes
+Apply development file to k8s
+
+```shell
+kubectl apply -f k8s/deployment.yaml
+```
+📌 This service can run with 5 different pods. All pods use common data.
+
+## Used Libraries
+
+[Swagger](https://github.com/swaggo) For API Documentation </br>
+[Testify](https://github.com/stretchr/testify) For Test
+
+## Inception
+[excalidraw](https://excalidraw.com/#json=gww-IAkHNXslZjEIwC4US,YrQX5EU2s--dIM9eeOrIBA)
+
+## API DOC
+
 ### Swagger
 
 Install swagger
 ```shell
 go install github.com/swaggo/swag/cmd/swag@latest
 ```
+
 Swagger Initialize
 ```shell
 swag init
 ```
-#### API DOC
+
+**Dev**
+
 First of all you must run the project.
 http://localhost:6161/api/swagger/index.html
 
-### Inception
-[excalidraw](https://excalidraw.com/#json=gww-IAkHNXslZjEIwC4US,YrQX5EU2s--dIM9eeOrIBA)
+**Production [Heroku]**
 
-### Used Libraries
+📃 [Shortly swagger API doc in live](https://sleepy-harbor-07771.herokuapp.com/api/swagger/index.html)
 
-[Swagger](https://github.com/swaggo) For API Documentation </br>
-[Testify](https://github.com/stretchr/testify) For Test
+## It is Live in HEROKU
+
+❗️️Heroku may remove project data for it is free that's why you don't may see your data.
+
+📺 [Shortly Base URL](https://sleepy-harbor-07771.herokuapp.com) </br>
+⛑ [Service Health](https://sleepy-harbor-07771.herokuapp.com/api/v1/health)

config/config.go

@@ -56,7 +56,7 @@ func (c *Config) Print() {
 func shortlyViberString(envKey, defaultKey string) string {
 	envValue := os.Getenv(envKey)
 
-	if len(envValue) == 0 {
+	if envValue == "" {
 		return defaultKey
 	}
 
@@ -66,7 +66,9 @@ func shortlyViberString(envKey, defaultKey string) string {
 func shortlyViberInt(envKey string, defaultValue int) int {
 	envValue := os.Getenv(envKey)
 
-	envIntegerValue, err := strconv.ParseInt(envValue, 10, 64)
+	base, bit := 10, 64
+
+	envIntegerValue, err := strconv.ParseInt(envValue, base, bit)
 
 	if err != nil {
 		return defaultValue