[CROSSDATA-15] [DOC] Best practices doc added
[CROSSDATA-15] [DOC] Best practices doc added

pmadrigal/Crossdata,Stratio/crossdata,Stratio/crossdata,miguel0afd/crossdata,darroyocazorla/crossdata,luismcl/crossdata,jjlopezm/crossdata,miguel0afd/crossdata,hdominguez1989/Crossdata,luismcl/crossdata,hdominguez1989/Crossdata,compae/Crossdata,darroyocazorla/crossdata,compae/Crossdata,gserranojc/Crossdata,jjlopezm/crossdata,gserranojc/Crossdata,pmadrigal/Crossdata