解决程序源文件更新了，但是 docker container 中的程序源文件没有更新的问题

问题出在 build.sh 中的 --mount type=volume,src=englishpal-db,target=/app 。
运行 docker container 时，会将整个 englishpal-db 对应的文件夹 /var/lib/docker/volumes/englishpal-db/_data
下面的内容拷贝到  docker container 里面的 /app 文件夹下面。

然而，/var/lib/docker/volumes/englishpal-db/_data 下面的源程序文件并不是最新的（比如其 main.py 是 7月17日的）。
将 target=/app 改为 target=/app/db。即可解决问题。

Dockerfile

@@ -1,5 +1,5 @@
 FROM tiangolo/uwsgi-nginx-flask:python3.8-alpine
-COPY requirements.txt /app
-RUN pip3 install -U pip
-RUN pip3 install -r requirements.txt -i https://mirrors.aliyun.com/pypi/simple/
+COPY requirements.txt /tmp
 COPY ./app/ /app/
+RUN pip3 install -U pip -i https://mirrors.aliyun.com/pypi/simple/
+RUN pip3 install -r /tmp/requirements.txt -i https://mirrors.aliyun.com/pypi/simple/

app/Article.py

@@ -11,7 +11,7 @@ from difficulty import get_difficulty_level_for_user, text_difficulty_level, use
 
 
 path_prefix = '/var/www/wordfreq/wordfreq/'
-path_prefix = './'  # comment this line in deployment
+path_prefix = './db/'  # comment this line in deployment
 
 
 def total_number_of_essays():

app/model/__init__.py

@@ -1,7 +1,7 @@
 from pony.orm import *
 
 db = Database()
-db.bind("sqlite", "../wordfreqapp.db", create_db=True)  # bind sqlite file
+db.bind("sqlite", "../db/wordfreqapp.db", create_db=True)  # bind sqlite file
 
 
 class User(db.Entity):

app/templates/login.html

@@ -39,7 +39,6 @@
   <input type="password" placeholder="密码" class="password"  id="password">
   <button type="button" class="btn" onclick="login()">登录</button>
   <a class="signup" href="/signup">注册</a>
-  <label class="form-text">2023-08-10</label>
 </div>
 
 {% endif %}

app/templates/mainpage_get.html

@@ -44,6 +44,7 @@
                 <a href="http://youdao.com/w/eng/{{x[0]}}/#keyfrom=dict2.index">{{x[0]}}</a> {{x[1]}}
             {% endfor %}
         {% endif %}
+        <p class="text-muted">Version: 20230810</p>
         <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
     </div>
     {{ yml['footer'] | safe }}

build.sh

@@ -3,9 +3,6 @@
 DEPLOYMENT_DIR=/home/lanhui/englishpal2/EnglishPal
 cd $DEPLOYMENT_DIR
 pwd
-# Install dependencies
-
-#pip3 install -r requirements.txt
 
 # Stop service
 sudo docker stop EnglishPal
@@ -15,7 +12,7 @@ sudo docker rm EnglishPal
 sudo docker build -t englishpal .
 
 # Run the application
-sudo docker run --restart=always -d --name EnglishPal -p 90:80 -v ${DEPLOYMENT_DIR}/app/static/frequency:/app/static/frequency --mount type=volume,src=englishpal-db,target=/app -t englishpal  # for permanently saving data
+sudo docker run --restart=always -d --name EnglishPal -p 90:80  -v ${DEPLOYMENT_DIR}/app/static/frequency:/app/static/frequency --mount type=volume,src=englishpal-db,target=/app/db -t englishpal # for permanently saving data
 
 # Save space.  Run it after sudo docker run
 sudo docker system prune -a -f