From 44b0f6443f5f2dc337ccff23cdfdb3ad7a5de649 Mon Sep 17 00:00:00 2001
From: Grzegorz Kucmierz <gkucmierz@gmail.com>
Date: Thu, 19 Feb 2026 07:08:27 +0100
Subject: [PATCH] fix: allow dynamic container name to prevent conflicts

---
 .env.example       | 2 ++
 docker-compose.yml | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)
 create mode 100644 .env.example

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..7d48241
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,2 @@
+# Optional: Set a custom container name to run multiple instances
+# CONTAINER_NAME=nonograms-dev
diff --git a/docker-compose.yml b/docker-compose.yml
index 6a30f7d..b52c7a2 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,7 +2,7 @@ version: '3.8'
 
 services:
   nonograms:
-    container_name: nonograms
+    container_name: ${CONTAINER_NAME:-nonograms}
     build:
       context: .
       dockerfile: Dockerfile