Configure relay for production certificate resolver

relay-server/.env.example

@@ -2,5 +2,7 @@ PORT=3000
 MAX_FILE_SIZE_MB=25
 UPLOADS_DIR=/data/files
 FILE_TTL_DAYS=30
+# Must match the certificate resolver configured by the host Traefik instance.
+TRAEFIK_CERT_RESOLVER=myresolver
 # Required for POST /admin/cleanup. Generate a unique value, for example: openssl rand -hex 32
 ADMIN_TOKEN=replace-with-a-unique-random-secret

relay-server/docker-compose.yml

@@ -14,7 +14,7 @@ services:
       - "traefik.enable=true"
       - "traefik.http.routers.fchati.rule=Host(`fchati.diyaa.de`)"
       - "traefik.http.routers.fchati.entrypoints=websecure"
-      - "traefik.http.routers.fchati.tls.certresolver=letsencrypt"
+      - "traefik.http.routers.fchati.tls.certresolver=${TRAEFIK_CERT_RESOLVER:-myresolver}"
       - "traefik.http.services.fchati.loadbalancer.server.port=3000"
 
 volumes: