feat: update database structure

.gitignore

go.mod

go.sum

internal/backoffice/backoffice.go

internal/database/database.go

internal/monthlyNews/monthlyNews.go

internal/monthlyReport/monthlyReport.go

internal/poll/poll.go

internal/rootmux/rootmux.go

internal/rootmux/rootmux_test.go

internal/tester/tester.go

web/components/post/post.js