I tried to follow this link to mup 1.5.7 deploy a second meteor app on the same server under a different domain.
On mup setup I get
Start proxy: FAILED
------------------------------------STDERR------------------------------------
Error response from daemon: endpoint mup-nginx-proxy not found
Error response from daemon: network mup-proxy not found
Error: No such container: mup-nginx-proxy-letsencrypt
Error response from daemon: endpoint mup-nginx-proxy-letsencrypt not found
Error response from daemon: network mup-proxy not found
docker: Error response from daemon: driver failed programming external connectivity on endpoint mup-nginx-proxy (979f3670341088a4ab0b98e59e0ac25f31c9699757397b13182d08b7e05a7226): Error starting userland proxy: listen tcp4 0.0.0.0:443: bind: address already in use.
------------------------------------STDOUT------------------------------------
mup-nginx-proxy
Removed mup-nginx-proxy
Removed mup-nginx-proxy-letsencrypt
v1.13.1: Pulling from jrcs/letsencrypt-nginx-proxy-companion
Digest: sha256:e357f37c08366b7dbd6793daa5792a44ff3d764dfebdce85047bff5e06e3e7a7
Status: Image is up to date for jrcs/letsencrypt-nginx-proxy-companion:v1.13.1
docker.io/jrcs/letsencrypt-nginx-proxy-companion:v1.13.1
1.0.0: Pulling from zodern/nginx-proxy
Digest: sha256:62219e5d23cdacca6e7791b0a44016814e938a5346cd049403a5965da39434aa
Status: Image is up to date for zodern/nginx-proxy:1.0.0
docker.io/zodern/nginx-proxy:1.0.0
Pulled zodern/nginx-proxy and jrcs/letsencrypt-nginx-proxy-companion
7dc1affd2ca576b43bf81393a7f5ac8fcc5adfa3dd0e04a6bb54d625c1464189