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Example using Docker WireGuard Tunnel with Traefik

Traefik can allow multiple Docker services to be served from a single server using different domain names and can automatically provision TLS/HTTPS certificates via Let's Encrypt and a HTTP challenge.

This assumes that you have already setup subdomain DNS entries for your domain, for example:
wireguard-tunnel.example.com, nginx.example.com and nginx-demo.example.com

Server

Will accept connections on behalf of a peer and tunnel them to the designated peer.

docker-compose.yml

services:
  traefik:
    image: "traefik:v2.9"
    container_name: "traefik"
    restart: unless-stopped
    ports:
      - "80:80"
      - "443:443"
      # (Optional) Expose Dashboard
      # - "8080:8080"  # Don't do this in production!
    volumes:
      - ./traefik:/etc/traefik
      - /var/run/docker.sock:/var/run/docker.sock:ro
    networks:
      - "traefik"

  wireguard-tunnel-server:
    image: ghcr.io/digitallyrefined/docker-wireguard-tunnel:v3
    container_name: wireguard-tunnel-server
    environment:
      # Update to your domain
      - DOMAIN=wireguard-tunnel.example.com
      # Number of peers to auto generate config for
      - PEERS=1
      # Services to expose format (comma-separated)
      # SERVICES=peer-id:peer-container-name:peer-container-port:expose-port-as
      - SERVICES=peer1:nginx:80:8080,peer1:nginx-demo:80:8081
    cap_add:
      - NET_ADMIN
    volumes:
      - ./wireguard/config:/etc/wireguard
    restart: unless-stopped
    ports:
      - '51820:51820/udp'
    networks:
      - "traefik"
    labels:
      traefik.enable: true

      traefik.http.routers.nginx.entrypoints: web,websecure
      traefik.http.routers.nginx.rule: Host(`nginx.example.com`) # Update to your domain
      traefik.http.routers.nginx.tls: true
      traefik.http.routers.nginx.tls.certresolver: production
      traefik.http.services.nginx.loadbalancer.server.port: 8080

      traefik.http.routers.nginx-demo.entrypoints: web,websecure
      traefik.http.routers.nginx-demo.rule: Host(`nginx-demo.example.com`) # Update to your domain
      traefik.http.routers.nginx-demo.tls: true
      traefik.http.routers.nginx-demo.tls.certresolver: production
      traefik.http.services.nginx-demo.loadbalancer.server.port: 8081

networks:
  traefik:
    external: true

config/traefik.yml

global:
  checkNewVersion: false
  sendAnonymousUsage: false  # true by default

# (Optional) Log information
# ---
log:
 level: WARNING #ERROR  # DEBUG, INFO, WARNING, ERROR, CRITICAL
#   format: common  # common, json, logfmt
#   filePath: /var/log/traefik/traefik.log

# (Optional) Accesslog
# ---
# accesslog:
  # format: common  # common, json, logfmt
  # filePath: /var/log/traefik/access.log

# (Optional) Enable API and Dashboard
# ---
api:
  dashboard: false # true by default
  debug: false
  insecure: false # Don't do this in production!

# Entry Points configuration
# ---
entryPoints:
  web:
    address: :80
    # (Optional) Redirect to HTTPS
    # ---
    http:
      redirections:
        entryPoint:
          to: websecure
          scheme: https
          priority: 1000

  websecure:
    address: :443

ping:
  entryPoint: web

certificatesResolvers:
  production:
    acme:
      email: [email protected] # Update this!
      storage: /etc/traefik/certs/acme.json
      caServer: "https://acme-v02.api.letsencrypt.org/directory"
      httpChallenge:
        entryPoint: web

serversTransport:
  insecureSkipVerify: true

providers:
  docker:
    exposedByDefault: false  # Default is true
  file:
    # watch for dynamic configuration changes
    directory: /etc/traefik
    watch: true
docker compose up -d
docker compose logs -f

Once started, a peer1.conf file will be automatically generated in the config directory.

Next create the certificates storage file with the correct permissions via:

docker compose exec traefik install -D -m 600 /dev/null /etc/traefik/certs/acme.json
docker compose restart

Peer

Will connect to the server via WireGuard and setup a tunnel to expose the listed ports.

Move the config/peer1.conf file from the server that was automatically generated and rename it to config/wg0.conf on the peer.

docker-compose.yml

services:
  wireguard-tunnel-peer:
    image: ghcr.io/digitallyrefined/docker-wireguard-tunnel:v3
    container_name: wireguard-tunnel-peer
    environment:
      # Note that DOMAIN & PEERS are not required for the peer
      # Services to expose format (comma-separated)
      # SERVICES=peer-id:peer-container-name:peer-container-port:expose-port-as
      - SERVICES=peer1:nginx:80:8080,peer1:nginx-demo:80:8081
    cap_add:
      - NET_ADMIN
    volumes:
      - ./config:/etc/wireguard
    restart: unless-stopped
    links:
      - nginx:nginx
      - nginx-demo:nginx-demo

  nginx:
    image: nginx
    restart: unless-stopped

  nginx-demo:
    image: nginxdemos/hello
    restart: unless-stopped
docker compose up -d
docker compose logs -f

Note: if you have a firewall in front of your server you will need to allow connections on port 51820/udp for the WireGuard server, and connections on ports 80 and 443 for Traefik.

Once started you should be able to access both nginx servers via the domain names listed on the WireGuard server, for example:
https://nginx.example.com and https://nginx-demo.example.com