chore(doc/server): update server mode documentation
chore(doc/server): update server mode documentation

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

javra/lean,digama0/lean,avigad/lean,johoelzl/lean,sp3ctum/lean,leodemoura/lean,soonhokong/lean-osx,fpvandoorn/lean2,soonhokong/lean,soonhokong/lean-windows,htzh/lean,levnach/lean,leanprover-community/lean,javra/lean,UlrikBuchholtz/lean,Kha/lean,rlewis1988/lean,soonhokong/lean-windows,Kha/lean,levnach/lean,johoelzl/lean,sp3ctum/lean,soonhokong/lean,c-cube/lean,UlrikBuchholtz/lean,avigad/lean,digama0/lean,avigad/lean,Kha/lean,dselsam/lean,sp3ctum/lean,Kha/lean,leanprover/lean,dselsam/lean,fpvandoorn/lean,c-cube/lean,fpvandoorn/lean2,soonhokong/lean-osx,levnach/lean,leodemoura/lean,soonhokong/lean-osx,eigengrau/lean,soonhokong/lean-windows,leanprover/lean,johoelzl/lean,c-cube/lean,sp3ctum/lean,digama0/lean,leanprover/lean,fgdorais/lean,soonhokong/lean,johoelzl/lean,soonhokong/lean,htzh/lean,leanprover-community/lean,soonhokong/lean-osx,avigad/lean,johoelzl/lean,fpvandoorn/lean,soonhokong/lean-windows,fpvandoorn/lean2,Kha/lean,leanprover-community/lean,leanprover-community/lean,htzh/lean,UlrikBuchholtz/lean,leanprover/lean,UlrikBuchholtz/lean,dselsam/lean,fgdorais/lean,rlewis1988/lean,sp3ctum/lean,fpvandoorn/lean2,digama0/lean,rlewis1988/lean,fgdorais/lean,leodemoura/lean,leanprover/lean,leanprover/lean,UlrikBuchholtz/lean,digama0/lean,eigengrau/lean,Kha/lean,eigengrau/lean,eigengrau/lean,fpvandoorn/lean,javra/lean,levnach/lean,fgdorais/lean,rlewis1988/lean,levnach/lean,fpvandoorn/lean,eigengrau/lean,leodemoura/lean,htzh/lean,soonhokong/lean,avigad/lean,fgdorais/lean,c-cube/lean,avigad/lean,rlewis1988/lean,fpvandoorn/lean2,soonhokong/lean-windows,dselsam/lean,dselsam/lean,rlewis1988/lean,johoelzl/lean,javra/lean,fpvandoorn/lean,leodemoura/lean,fgdorais/lean,leanprover-community/lean,fpvandoorn/lean,digama0/lean,htzh/lean,javra/lean,dselsam/lean,soonhokong/lean-osx,leanprover-community/lean,leodemoura/lean,c-cube/lean