docs: added why and architeture on index.
docs: added why and architeture on index.

tsuru/tsuru,tuxmonteiro/tsuru,tsuru/tsuru,cezarsa/tsuru,ArxdSilva/tsuru,kgrvamsi/tsuru,guilhermebr/tsuru,cezarsa/tsuru,gciotta/tsuru,cezarsa/tsuru,4eek/tsuru,hcxiong/tsuru,firebitsbr/tsuru,mderaldo/tsuru,gwmoura/tsuru,RichardKnop/tsuru,cgvarela/tsuru,hugoantunes/tsuru,tuxmonteiro/tsuru,mderaldo/tsuru,RichardKnop/tsuru,firebitsbr/tsuru,ArxdSilva/tsuru,4eek/tsuru,kgrvamsi/tsuru,Endika/tsuru,ArxdSilva/tsuru,hcxiong/tsuru,cezarsa/tsuru,tuxmonteiro/tsuru,hugoantunes/tsuru,jblancett/tsuru,ArxdSilva/tsuru,gciotta/tsuru,tsuru/tsuru,guilhermebr/tsuru,gwmoura/tsuru,gwmoura/tsuru,Endika/tsuru,ggarnier/tsuru,gciotta/tsuru,4eek/tsuru,jblancett/tsuru,ggarnier/tsuru,Endika/tsuru,jblancett/tsuru,RichardKnop/tsuru,kgrvamsi/tsuru,ggarnier/tsuru,hcxiong/tsuru,firebitsbr/tsuru,cgvarela/tsuru,tsuru/tsuru,guilhermebr/tsuru,cgvarela/tsuru,mderaldo/tsuru,ggarnier/tsuru,guilhermebr/tsuru