public JibContainerBuilder addEnvironmentVariable(String name, String value) {
    containerBuildPlanBuilder.addEnvironmentVariable(name, value);
    containerConfigurationBuilder.addEnvironment(name, value);
    return this;
  }
Adds a variable in the container environment.

@param name the environment variable name
@param value the environment variable value
@return this
@see #setEnvironment
jib-core/src/main/java/com/google/cloud/tools/jib/api/JibContainerBuilder.java