readme: Changed flag wording to env var
readme: Changed flag wording to env var

More accurate. Flag sounds like it's a cli flag.

kwagdy/koding-1,acbodine/koding,alex-ionochkin/koding,andrewjcasal/koding,usirin/koding,szkl/koding,acbodine/koding,alex-ionochkin/koding,szkl/koding,andrewjcasal/koding,usirin/koding,koding/koding,drewsetski/koding,drewsetski/koding,koding/koding,sinan/koding,sinan/koding,jack89129/koding,mertaytore/koding,kwagdy/koding-1,gokmen/koding,cihangir/koding,gokmen/koding,acbodine/koding,cihangir/koding,koding/koding,mertaytore/koding,jack89129/koding,andrewjcasal/koding,acbodine/koding,szkl/koding,drewsetski/koding,sinan/koding,cihangir/koding,mertaytore/koding,cihangir/koding,sinan/koding,gokmen/koding,alex-ionochkin/koding,rjeczalik/koding,acbodine/koding,acbodine/koding,drewsetski/koding,rjeczalik/koding,szkl/koding,gokmen/koding,usirin/koding,kwagdy/koding-1,kwagdy/koding-1,cihangir/koding,andrewjcasal/koding,kwagdy/koding-1,koding/koding,alex-ionochkin/koding,andrewjcasal/koding,koding/koding,alex-ionochkin/koding,andrewjcasal/koding,rjeczalik/koding,sinan/koding,drewsetski/koding,koding/koding,koding/koding,mertaytore/koding,sinan/koding,jack89129/koding,rjeczalik/koding,gokmen/koding,gokmen/koding,alex-ionochkin/koding,szkl/koding,kwagdy/koding-1,andrewjcasal/koding,usirin/koding,cihangir/koding,szkl/koding,usirin/koding,andrewjcasal/koding,jack89129/koding,cihangir/koding,jack89129/koding,sinan/koding,mertaytore/koding,jack89129/koding,szkl/koding,usirin/koding,cihangir/koding,acbodine/koding,sinan/koding,gokmen/koding,szkl/koding,rjeczalik/koding,rjeczalik/koding,gokmen/koding,acbodine/koding,mertaytore/koding,rjeczalik/koding,jack89129/koding,alex-ionochkin/koding,mertaytore/koding,kwagdy/koding-1,usirin/koding,koding/koding,mertaytore/koding,drewsetski/koding,drewsetski/koding,usirin/koding,alex-ionochkin/koding,kwagdy/koding-1,drewsetski/koding,jack89129/koding,rjeczalik/koding