doc(examples): improve example documentation
doc(examples): improve example documentation

postgraphql/postgraphql,calebmer/postgraphql,nbushak/postgraphql,nbushak/postgraphql,nbushak/postgraphql,postgraphql/postgraphql,calebmer/postgraphql,postgraphql/postgraphql,postgraphql/postgraphql,calebmer/postgraphql,calebmer/postgraphql,ferdinandsalis/postgraphql,nbushak/postgraphql,ferdinandsalis/postgraphql