CreateCampaign und Campaigns bzgl DB umgeschrieben

go.mod

go.sum

scripts/start-mariadb.sh

scripts/stop-mariadb.sh

src/myaktion/db/db.go

src/myaktion/model/account.go

src/myaktion/model/campaign.go

src/myaktion/model/donation.go

src/myaktion/service/campaign.go

tests.txt