Add traefik.

traefik/docker-compose.yaml

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+---
+# https://doc.traefik.io/traefik/user-guides/docker-compose/acme-http/
+# https://stackoverflow.com/questions/58584625/how-do-i-reference-a-self-signed-ssl-certificates-for-traefik-v2-in-a-docker-com
+
+version: '3.9'
+
+networks:
+    proxy:
+        external: true
+
+services:
+    reverse-proxy:
+        container_name: traefik
+        image: traefik:2.8
+        restart: unless-stopped
+        ports:
+            - 80:80
+            - 443:443
+        networks:
+            # Use the public network created to be shared between Traefik and
+            # any other service that needs to be publicly available with HTTPS
+            - proxy
+        command:
+            - --providers.docker # Enable Docker in Traefik, so that it reads labels from Docker services
+            - --providers.docker.exposedbydefault=false # Do not expose all Docker services, only the ones explicitly exposed
+            - --providers.docker.network=proxy # Adds default network
+            #- --log.level=INFO
+            - --api.dashboard=true
+            # - --accesslog # Enable Access log
+            # - --ping=true # Enable /ping healthcheck route
+              # Set up LetsEncrypt
+            - --certificatesresolvers.letsencrypt.acme.dnschallenge=true
+            - --certificatesresolvers.letsencrypt.acme.dnschallenge.provider=cloudflare
+            - --certificatesresolvers.letsencrypt.acme.email=${EMAIL_ADDRESS}
+            - --certificatesresolvers.letsencrypt.acme.storage=/letsencrypt/acme.json
+              # Set up an insecure listener that redirects all traffic to TLS
+            - --entrypoints.web.address=:80
+            - --entrypoints.web.http.redirections.entrypoint.to=websecure # Redirect all http to https
+            - --entrypoints.web.http.redirections.entrypoint.scheme=https
+              # Set up the TLS configuration for our websecure listener
+            - --entrypoints.websecure.address=:443
+            - --entrypoints.websecure.http.tls=true
+            - --entrypoints.websecure.http.tls.certResolver=letsencrypt
+            - --entrypoints.websecure.http.tls.domains[0].main=golem.linux.it
+            - --entrypoints.websecure.http.tls.domains[0].sans=*.golem.linux.it
+              # SSH
+            # - --entrypoints.ssh.address=:22 # host system must use another port!
+        volumes:
+            - /var/run/docker.sock:/var/run/docker.sock:ro # Add Docker as a mounted volume, so that Traefik can read the labels of other services
+            - /srv/volumes/letsencrypt:/letsencrypt
+        environment:
+            - CLOUDFLARE_EMAIL=${CLOUDFLARE_ACCOUNT_EMAIL_ADDRESS}
+            - CLOUDFLARE_DNS_API_TOKEN=${CLOUDFLARE_TOKEN_GOES_HERE}
+        labels:
+            - traefik.enable=true
+            - traefik.http.routers.dashboard.service=api@internal
+            - traefik.http.routers.dashboard.rule=Host(`traefik.889217.xyz`)
+            - traefik.http.routers.dashboard.entrypoints=websecure
+            - traefik.http.routers.dashboard.tls.certresolver=letsencrypt
+        healthcheck:
+            test: [CMD, traefik, healthcheck, --ping]
+            interval: 10s
+            timeout: 5s
+            retries: 3
+            start_period: 15s
+
+    demo-service:
+        container_name: whoami
+        image: traefik/whoami
+        restart: unless-stopped
+        networks:
+            - proxy
+        labels:
+            - traefik.enable=true
+            - traefik.http.routers.whoami.rule=Host(`whoami.golem.linux.it`)
+            - traefik.http.routers.whoami.entrypoints=websecure
+            - traefik.http.routers.whoami.tls.certresolver=letsencrypt
+            - traefik.http.services.whoami.loadbalancer.server.port=80