Deployment supports nginx and PostgreSQL installed on the host, added import of an existing installation.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

deploy/docker-compose.yml

@@ -1,11 +1,15 @@
 # Shared infrastructure for running one Rezervovator container per customer:
 # the reverse proxy and the PostgreSQL server. Customer containers are not listed
 # here, they are created with ./rezervator.sh (see README.md in this directory).
+#
+# Both services are optional and selected by profiles: ./rezervator.sh init starts
+# "traefik" unless REZERVATOR_PROXY=nginx, and "postgres" unless REZERVATOR_POSTGRES=host.
 
 name: ${REZERVATOR_PREFIX:-rezervator}
 
 services:
   proxy:
+    profiles: ["traefik"]
     image: traefik:v3
     container_name: ${REZERVATOR_PREFIX:-rezervator}-proxy
     restart: unless-stopped
@@ -31,11 +35,12 @@ services:
       - rezervator
 
   postgres:
+    profiles: ["postgres"]
     image: postgres:17
     container_name: ${REZERVATOR_PREFIX:-rezervator}-postgres
     restart: unless-stopped
     environment:
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?Set POSTGRES_PASSWORD in .env (./rezervator.sh init creates it)}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-}
     # Every customer instance may open up to CUSTOMER_MAX_CONNECTIONS connections
     command: ["postgres", "-c", "max_connections=${PG_MAX_CONNECTIONS:-300}"]
     volumes:
@@ -48,9 +53,12 @@ services:
     networks:
       - rezervator
 
+# Created by ./rezervator.sh init, because customer containers use it even when
+# neither service above runs
 networks:
   rezervator:
     name: ${REZERVATOR_PREFIX:-rezervator}
+    external: true
 
 volumes:
   letsencrypt: