Update readme to note ENV for SURVEY_NAME
Update readme to note ENV for SURVEY_NAME

codeforgso/cityvoice,codeforamerica/cityvoice,daguar/cityvoice,codeforgso/cityvoice,ajb/cityvoice,ajb/cityvoice,codeforamerica/cityvoice,ajb/cityvoice,codeforgso/cityvoice,ajb/cityvoice,daguar/cityvoice,daguar/cityvoice,codeforamerica/cityvoice,codeforgso/cityvoice,daguar/cityvoice,codeforamerica/cityvoice