There has been some issues with ARM infrastructure in the past in which would be worth searching for - such as the following - however you may need some assistance from someone who knows the infrastructure better than myself.
Ehi, sei riuscito a risolvere quel problema?
Sto cercando di installare Discourse su un VPS Scaleway con Ubuntu 18.04 LTS (arm64)
e ricevo lo stesso errore (standard_init_linux.go:211: exec user process caused “exec format error”)
Client: Docker Engine - Community
Versione: 19.03.2
Versione API: 1.40
Versione Go: go1.12.8
Commit Git: 6a30dfc
Compilato: Thu Aug 29 05:32:21 2019
OS/Arch: linux/arm64
Sperimentale: false
Server: Docker Engine - Community
Engine:
Versione: 19.03.2
Versione API: 1.40 (versione minima 1.12)
Versione Go: go1.12.8
Commit Git: 6a30dfc
Compilato: Thu Aug 29 05:30:53 2019
OS/Arch: linux/arm64
Sperimentale: false