inital setup

.env.sample

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+TAG=
+APIPORT=
+BASEDIR=
+EXTRANET=
+INTRANET=

.gitignore

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+files/
+.env

docker-compose.yml

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+# https://docs.docker.com/compose/compose-file/compose-file-v3/
+---
+version: "3.9"
+services:
+  caddy:
+    image: caddy:${TAG:-alpine}
+    container_name: caddy
+    env_file: .env
+    restart: unless-stopped
+    deploy:
+      replicas: 1                         # in swarm set min 2
+      placement:
+        max_replicas_per_node: 1
+      update_config:
+        parallelism: 1
+        delay: 10s
+    ports:
+      - 80:80
+      - 443:443
+      - ${APIPORT:-2019}:2019
+    volumes:
+      - ${BASEDIR:-./files}/conf:/etc/caddy/
+      - ${BASEDIR:-./files}/data/:/data
+    networks:
+      - frontend
+      - backend
+
+networks:
+  frontend:
+    name: ${EXTRANET:-frontend}
+    external: true
+  backend:
+    name: ${INTRANET:-backend}
+    external: true

files/conf/Caddyfile

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+import snippets/*
+import pages/*

files/conf/pages/example.com

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+http://example.com {
+    import auth "*"
+    respond "example.com here!"
+}

files/conf/snippets/auth

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+## generate pass hash (debian):
+# sudo apt install apache2-utils 
+# htpasswd -bnBC 10 "" password | tr -d ':'
+
+# user:     test
+# password: password
+
+(auth) {
+    basicauth {args.0} {
+        test $2y$10$XSrHHXUlQZeRumAc9nl7QevDzKv9H5TXVtb6nxr0Gmrk6VogHWRVK
+    }
+}