justify-content: flex-start; /*default*/
item 1
item 2
item 3
item 4
justify-content: flex-end;
item 1
item 2
item 3
item 4
justify-content: center;
item 1
item 2
item 3
item 4
justify-content: space-between;
item 1
item 2
item 3
item 4
justify-content: space-around;
item 1
item 2
item 3
item 4