Simple Proxy Config

I'm using Traefix 2.x in docker container. I would like to setup a dozen or so simple static conversions. For Example:
Host1.domain.com:80 -> 192.168.0.10:8080
Host1.domain.com:90 -> 192.168.0.10:8090
Host2.domain.com:80 -> 192.168.0.10:9090
Host4.domain.com:80 -> 192.168.0.11:8080\admin

Hello,

Do you have a problem, a question? How we can help you?

docker-compose.yml
version: "3.7"

services:
  traefik:
    image: traefik:v2.1.6
    ports:
      - "80:80"
      - "90:90"
      - "8080:8080"
    command:
      # https://docs.traefik.io/v2.1/operations/api/#insecure
      - --api.insecure

      # https://docs.traefik.io/v2.1/routing/entrypoints/
      - --entryPoints.web.address=:80
      - --entryPoints.foo.address=:90
      
      # https://docs.traefik.io/v2.1/providers/file/
      - --providers.file.directory=/conf/
      - --providers.file.watch=true
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./conf/:/conf/

/conf/dyn.yml

# https://docs.traefik.io/v2.1/routing/overview/

http:
  # https://docs.traefik.io/v2.1/routing/routers/#configuring-http-routers
  routers:

    host1:
      rule: Host(`host1.domain.com`)
      entryPoints:
        - web
      service: host1_svc

    host1_foo:
      rule: Host(`host1.domain.com`)
      entryPoints:
        - foo
      service: host1_foo_svc

    host2:
      rule: Host(`host2.domain.com`)
      entryPoints:
        - web
      service: host2_svc

    host4:
      rule: Host(`host4.domain.com`)
      entryPoints:
        - web
      service: host4_svc
      middlewares:
        - add_admin

  # https://docs.traefik.io/v2.1/routing/services/#configuring-http-services
  services:

    host1_svc:
      loadBalancer:
        servers:
          - url: 192.168.0.10:8080

    host1_foo_svc:
      loadBalancer:
        servers:
          - url: 192.168.0.10:8090

    host2_svc:
      loadBalancer:
        servers:
          - url: 192.168.0.10:9090

    host4_svc:
      loadBalancer:
        servers:
          - url: 192.168.0.11:8080

  # https://docs.traefik.io/v2.1/middlewares/overview/
  middlewares:
    # https://docs.traefik.io/v2.1/middlewares/addprefix/
    add_admin:
      addPrefix:
        prefix: /admin

Documentation:

Thanks Idez,
I have the same requirement as the first post.
Your solution does not work for me but I don't know why.
My error is "internal server error" through http and "404 page not found" through https

#Traefik.yaml
providers:
  docker:
    endpoint: "unix:///var/run/docker.sock"
    network: "traefik" # Custom docker network
    exposedByDefault: false # Only expose explicitly enabled containers
  file:
    directory: "/etc/traefik/"
    watch: true

entryPoints:
  unsecure:
    address: ":80"
  secure:
    address: ":443"

api:
  dashboard: true
  insecure: true

log:
  level: DEBUG

# docker-compose.yaml
version: '3.7'

services:

################################################################################

  traefik:
    image: "traefik"
    container_name: "traefik"
    restart: always
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /home/pi/docker/traefik/:/etc/traefik/
    networks:
      - traefik
    labels:
      #Super important!
      - "traefik.enable=true"
      - "traefik.http.routers.traefik.rule=Host(`traefik.dockerpi.local`)"
      - "traefik.http.services.traefik.loadbalancer.server.port=8080"

#############################################################################
[...]

networks:
  traefik:
    external: true

And finally my file for the static servers: (I basically copy/pasted your proposal, but stating a plain IP w/o https:// in front gave me a parsing error. I tried //IP and https:// both parsed well, but no resolving)

# https://docs.traefik.io/v2.1/routing/overview/

http:
  # https://docs.traefik.io/v2.1/routing/routers/#configuring-http-routers
  routers:

    host1:
      rule: Host(`test.dockerpi.local`)
      entryPoints:
        - unsecure
        - secure
      service: host1_svc

  # https://docs.traefik.io/v2.1/routing/services/#configuring-http-services
  services:

    host1_svc:
      loadBalancer:
        servers:
          - url: https://10.1.0.10:91