feat: add TIMEZONE environment variable to docker-compose.yml for API service

docker-compose.yml

@@ -33,7 +33,7 @@ services:
     command: ["uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "8000"]
 
     ports:
-      - "8000:8000"
+      - "${API_PORT:-8000}:8000"
 
     environment:
       - DB_HOST=${DB_HOST:-mariadb.fritz.box}
@@ -42,6 +42,7 @@ services:
       - DB_USER=${DB_USER}
       - DB_PASSWORD=${DB_PASSWORD}
       - LOG_LEVEL=${LOG_LEVEL:-INFO}
+      - TIMEZONE=${TIMEZONE:-Europe/Berlin}  # <--- Add this line
 
     labels:
       - "com.centurylinklabs.watchtower.enable=true"