Adding Customized Properties in Application.properties file

In application.properties files, add your own properties such as
```
mypropertis.version=dev
```
in the empty space. Here we use mypropertis as prefix, you can use whatever you want.

To read such value, create a class as a @Component

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
import lombok.Getter;
import lombok.Setter;

@Getter
@Setter
@ConfigurationProperties("mypropertis")
@Component
public class MyProperties {
    private String version= "";
}

Note that we have use lombok for the getter and setter.

Since we register our class as a @Component, we can do
```
@Autowired
    private MyProperties myProperties;
```
in our controllers / services
To get the value, we can do
```
myProperties.getVersion()
```
The value woule be “dev” in this case.