Light Deployment

[loleg]

Adds a new Docker Compose script with a "light" version of Proxeus Core, which only includes the JSON and Mail Sender nodes. Makes a few minor improvements to the documentation. Updated dependencies @ Go 1.20

Depends on #309

[loleg]

go: upgraded github.com/dop251/goja v0.0.0-20230427124612-428fc442ff5f => v0.0.0-20230605162241-28ee0ee714f3
go: upgraded github.com/google/pprof v0.0.0-20230510103437-eeec1cb781c3 => v0.0.0-20230602150820-91b7bce49751
go: upgraded github.com/klauspost/compress v1.16.5 => v1.16.6
go: upgraded github.com/onsi/gomega v1.27.7 => v1.27.8
go: upgraded github.com/stretchr/testify v1.8.3 => v1.8.4
go: upgraded github.com/tklauser/numcpus v0.6.0 => v0.6.1
go: upgraded go.mongodb.org/mongo-driver v1.11.6 => v1.11.7
go: upgraded golang.org/x/crypto v0.9.0 => v0.10.0
go: upgraded golang.org/x/image v0.7.0 => v0.8.0
go: upgraded golang.org/x/sys v0.8.0 => v0.9.0
go: upgraded golang.org/x/text v0.9.0 => v0.10.0