Compose file for Lemmy deployment with Caddy

docker-compose.yml

version: "3.9"
x-logging:
  &default-logging
  options:
    max-size: '10m'
  driver: json-file

services:
  caddy:
    image: caddy:2
    ports:
      - 80:80
      - 443:443
    volumes:
      - ./volumes/caddy:/data
      - ./volumes/caddy:/config
    # See Caddy's documentation for customizing this line
    # https://caddyserver.com/docs/quick-starts/reverse-proxy
    command:
      - /bin/sh
      - -c
      - |
        cat <<EOF > /etc/caddy/Caddyfile && caddy run --config /etc/caddy/Caddyfile
        
        {
          debug
        }
        
        (common) {
        	encode gzip
        	header {
        		-Server
        		Strict-Transport-Security "max-age=31536000; include-subdomains;"
        		X-XSS-Protection "1; mode=block"
        		X-Frame-Options "DENY"
        		X-Content-Type-Options nosniff
        		Referrer-Policy no-referrer-when-downgrade
        		X-Robots-Tag "none"
        	}
        }
      
        # Lemmy instance
        lemmy.emphisia.nl {
          log
          import common
          reverse_proxy http://lemmy-ui:1234 # lemmy-ui
          
          @lemmy {
        		path /api/*
        		path /pictrs/*
        		path /feeds/*
        		path /nodeinfo/*
        		path /.well-known/*
        	}
         
         	@lemmy-hdr {
        		header Accept application/*
        	}
          
          handle @lemmy {
            reverse_proxy http://lemmy:8085 # lemmy
          }
          
          handle @lemmy-hdr {
            reverse_proxy http://lemmy:8085
          }
          
          @lemmy-post {
        		method POST
        	}
        
        	handle @lemmy-post {
        		reverse_proxy http://lemmy:8085
        	}
        }
        EOF
  lemmy:
    image: dessalines/lemmy:0.18.1-rc.9
    ports:
      - 8085:8536
    volumes:
      - ./volumes/lemmy.hjson:/config/config.hjson
    depends_on:
      - postgres
      - pictrs
    restart: always
    logging: *default-logging

  lemmy-ui:
    image: dessalines/lemmy-ui:0.18.1-rc.9
    ports:
     - 1234:1234
    environment:
      - LEMMY_UI_LEMMY_INTERNAL_HOST=lemmy:8085
      - LEMMY_UI_LEMMY_EXTERNAL_HOST=localhost:1236
    depends_on:
      - lemmy
    volumes:
      - ./volumes/lemmy-ui/extra_themes:/app/extra_themes
    restart: always
    logging: *default-logging

  postgres:
    image: postgres:15-alpine
    ports:
      - 5432:5432
    environment:
      - POSTGRES_USER=MyPostgresUser
      - POSTGRES_DB=MyPostgresDB
      - POSTGRES_PASSWORD=MyPostgresPassword
    volumes:
      - ./volumes/postgres:/var/lib/postgresql/data
    restart: always
    logging: *default-logging

  pictrs:
    image: asonix/pictrs:0.4.0-rc.7
    user: 991:991
    hostname: pictrs
    environment:
      - PICTRS__MEDIA__VIDEO_CODEC=vp9
      - PICTRS__MEDIA__GIF__MAX_WIDTH=256
      - PICTRS__MEDIA__GIF__MAX_HEIGHT=256
      - PICTRS__MEDIA__GIF__MAX_AREA=65536
      - PICTRS__MEDIA__GIF__MAX_FRAME_COUNT=400
    volumes:
      - ./volumes/pictrs:/mnt
    restart: always
    logging: *default-logging
    
  postfix:
    image: mwader/postfix-relay
    environment:
      - POSTFIX_myhostname=lemmy.emphisia.nl
    restart: "always"
    logging: *default-logging