Answers for "column align flexbox"

css flex center

display: flex;
align-items: center;
justify-content: center;

center flex

.flex-container {
  display: flex;
  height: 300px;
  justify-content: 
  center;
  align-items: center;
}

flex align children to side

flex-direction: column;
align-items: flex-start; //left
align-items: center; //center
align-items: flex-end; //right