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.
Hey, did you ever manage to fix that issue?
i trying to install discourse on Scaleway VPS with ubuntu 18.04LTS (arm64)
and getting the same error (standard_init_linux.go:211: exec user process caused “exec format error”)
Client: Docker Engine - Community
Version: 19.03.2
API version: 1.40
Go version: go1.12.8
Git commit: 6a30dfc
Built: Thu Aug 29 05:32:21 2019
OS/Arch: linux/arm64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.2
API version: 1.40 (minimum version 1.12)
Go version: go1.12.8
Git commit: 6a30dfc
Built: Thu Aug 29 05:30:53 2019
OS/Arch: linux/arm64
Experimental: false