nginx+gunicorn+django error Not Found: /static/.. file - django

Question

I built a python web framework by using django, and I want to deploy it with nginx and gunicorn. However, I keep getting prompted for error about "Not Found: /static/answer/result.png". If I didn't use nginx adnd gunicorn I wouldn't get this error. I don't know what went wrong, please help me, thank you.
(1) settings.py file:
import os
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
SECRET_KEY = '...%a..............'
DEBUG = True
ALLOWED_HOSTS = ["127.0.0.1", "192.168.43.90", "192.168.2.229"]
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
"gunicorn",
'UserProfile',
'ImageRecognition',
"KuaiChao",
"HuaXiao"
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'LPAI.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR, 'templates')],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'LPAI.wsgi.application'
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
STATIC_URL = '/static/'
STATIC_ROOT = "static/"
STATICFILES_DIRS = (
os.path.join(BASE_DIR, "static"),
os.path.join(BASE_DIR, "templates"),
)
(2) /etc/nginx/sites-avaiable/default file
server {
listen 80 default_server;
listen [::]:80 default_server;
root /var/www/html;
# Add index.php to the list if you are using PHP
index index.html index.htm index.nginx-debian.html;
server_name 192.168.2.229;
location / {
# First attempt to serve request as file, then
# as directory, then fall back to displaying a 404.
proxy_pass 192.168.2.229:5000;
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
location /static {
autoindex on;
alias /home/guomin/resource/gitee/lapi_lz/static; # django app static file
# root /root/exampledir/static/;
}
}
(3) The command I used to start django: gunicorn LPAI.wsgi:application -w 4 -b 192.168.2.229:5000
(4) I get error: Not Found: /static/answer/EJE005/EJE005_1-1367351883672326145-1367316751137640449-result.png
Note that this image exists and its path is /home/guomin/resource/gitee/lapi_lz/static/answer/EJE005/EJE005_1-1367351883672326145-1367316751137640449-result.png
The above is all the relevant information, please help me.