fix: use data/ subdir for SQLite volume mount in Docker

Named volumes can't mount to a file path — use a directory.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -3,7 +3,7 @@ services:
     build: .
     env_file: .env
     volumes:
-      - db:/app/db.sqlite3
+      - db:/app/data
       - media:/app/media
       - static:/app/staticfiles
     expose:
@@ -17,7 +17,7 @@ services:
   nginx:
     image: nginx:alpine
     ports:
-      - "80:80"
+      - "8083:80"
     volumes:
       - ./nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
       - media:/app/media:ro

plantdb/settings.py

@@ -52,7 +52,7 @@ WSGI_APPLICATION = 'plantdb.wsgi.application'
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': BASE_DIR / 'db.sqlite3',
+        'NAME': BASE_DIR / 'data' / 'db.sqlite3',
     }
 }