diff --git a/.env.example b/.env.example
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--- /dev/null
+++ b/.env.example
@@ -0,0 +1,14 @@
+# Copia questo file in .env e adatta i valori.
+# .env NON è versionato (contiene config locale/secrets).
+
+# Cartella immagini (relativa al progetto in dev locale,
+# assoluta dentro container es. /data/images)
+IMAGES_DIR=Test
+
+# Web server
+HOST=127.0.0.1
+PORT=8080
+
+# Registry + tag per docker-compose (deploy VPS)
+REGISTRY=localhost:5000
+TAG=latest
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diff --git a/docker-compose.yml b/docker-compose.yml
index 2f0bb67..d424c15 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,7 +14,7 @@ services:
     environment:
       IMAGES_DIR: /data/images
       HOST: 0.0.0.0
-      PORT: 8080
+      PORT: ${PORT:-8080}
     volumes:
       # Persistenza immagini tra restart (upload/selezione)
       - ./images:/data/images
@@ -28,7 +28,7 @@ services:
       - "traefik.http.routers.pm2d.entrypoints=websecure"
       - "traefik.http.routers.pm2d.tls=true"
       - "traefik.http.routers.pm2d.tls.certresolver=letsencrypt"
-      - "traefik.http.services.pm2d.loadbalancer.server.port=8080"
+      - "traefik.http.services.pm2d.loadbalancer.server.port=${PORT:-8080}"
 
       # Middleware: upload fino a 50MB (default Traefik bufferizza a 4MB)
       - "traefik.http.middlewares.pm2d-bodysize.buffering.maxRequestBodyBytes=52428800"