Environment variable --.Question

Hello All,

I have some basic question with respect to environment variable where i need help with :

1)What are these environment variables ?
2)I know we can define them when the container is created ? How does it impact the container and the application running with the container ?

Like i would like to understand webapp-color POD that we created . So if i understand it correct we have an docker file by which we spin the container /Pod . And we set the env variable within the container to change /effect the application. Am i correct here ?

Hi @shashikaushal2006123

I hope this will help you.