create caddy-docker-proxy

caddy-docker-proxy/Dockerfile

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+FROM caddy:2.6.2-builder-alpine AS builder
+RUN xcaddy build --with github.com/lucaslorentz/caddy-docker-proxy/v2
+FROM caddy:2.6.2-alpine
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+CMD ["caddy", "docker-proxy", "--ingress-networks=caddy"]

caddy-docker-proxy/compose.yml

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+services:
+  caddy-docker-proxy:
+    image: fogtype/caddy-docker-proxy
+    build: "."
+    ports:
+      - "8080:80"
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+      - caddy_data:/data
+      - caddy_config:/config
+networks:
+  default:
+    name: caddy
+volumes:
+  caddy_data:
+  caddy_config:

caddy-docker-proxy/nginx/compose.yml

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+services:
+  nginx:
+    image: nginx:alpine
+    networks:
+      - caddy
+    labels:
+      caddy: http://nginx.localhost
+      caddy.reverse_proxy: "{{ upstreams }}"
+networks:
+  caddy:
+    external: true