Reimplement redirect domains

Signed-off-by: Tobias Manske <tobias.manske@mailbox.org>

compose/05_caddy/.env

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+COMPOSE_PROJECT_NAME=caddy

compose/05_caddy/Caddyfile

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+{
+    auto_https off
+}
+
+{% for rule in redirect.hosts %}
+http://{{ rule.from }} {
+    redir https://{{ rule.to }}{uri} permanent
+}
+
+{% endfor %}

compose/05_caddy/docker-compose.yml

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+---
+version: "3.4"
+
+services:
+  redirect:
+    image: caddy:2
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro,z
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.caddyredir.rule={{ redirect.hosts | map(attribute='from') | map('regex_replace', '^(.*)$', 'Host(`\\1`)') | join(' || ') }}"
+      - "traefik.http.routers.caddyredir.entryPoints=websecure"
+      - "traefik.http.services.caddyredir.loadbalancer.server.port=80"
+      - "com.centurylinklabs.watchtower.scope=update"
+    restart: always
+    networks:
+      - gateway
+
+networks:
+  gateway:
+    external: true