How to force www with Traefik - .htaccess

Question

Ive been learning Traefik to use as a reverse proxy for various Wordpress sites Im running in Docker containers on a server. Currently I have 2 domains setup with Wp on the same ip and are working correctly.
Im having problems getting the domains to redirect to www so right now at http://example.com it just shows 'Index of' I have tried forcing a redirection via htaccess but this isnt working so Im assuming theres something I have to do in the Traefik settings?
This is my docker-compose.yml file but Ive only included the important parts here:
services:
reverse-proxy:
image: traefik # The official Traefik docker image
command: --api --docker # Enables the web UI and tells Træfik to listen to docker
ports:
- "80:80" # The HTTP port
- "8080:8080" # The Web UI (enabled by --api)
volumes:
- /var/run/docker.sock:/var/run/docker.sock # So that Traefik can listen to the Docker events
- ./traefik.toml:/traefik.toml
wp-web2:
container_name: cowork-wp
image: wordpress:latest
restart: always
environment:
WORDPRESS_DB_HOST: mysql-db-cowork
WORDPRESS_DB_USER: foo
WORDPRESS_DB_NAME: foo
WORDPRESS_DB_PASSWORD: passwd123
depends_on:
- mysql-db-cowork
labels:
- "traefik.frontend.rule=Host:example.com"
- "traefik.frontend.rule=Host:www.example.com"
- "traefik.frontend.forcehost:www.example.com"
#- "traefik.frontend.rule=Path: /"
volumes:
- ./src-tdm:/var/www/html
As you can see in the labels Ive been trying different Hosts as well as 'forcehost' but none of these seemed to have worked.
And this is the toml file:
defaultEntryPoints = ["http"]
[entryPoints]
[entryPoints.http]
address = ":80"
#Define Docker Backend Configuration
[docker]
endpoint = "unix:///var/run/docker.sock"
domain = "example.com"
watch = true
exposedByDefault = true
and finally this is my force www rewrite rule from .htaccess
#Force www:
RewriteEngine on
RewriteCond %{HTTP_HOST} ^example.com [NC]
RewriteRule ^(.*)$ http://www.example.com$1 [L,R=301,NC]

Answer 1

A closer inspection of the documents shows that the different domains need to be defined with commas in the frontend Host: argument, eg:
- "traefik.frontend.rule=Host:www.example.com, example.com"