title: how to change Postgresql docker image password
body: <p>I have created a Postgresql docker image using the following command on Windows:</p>
  
  <pre><code>docker run --name airdb-postgres -e POSTGRES_PASSWORD=post1234 -d -p 5432:5432 postgres:alpine
  </code></pre>
  
  <p>is it possible to change the password I assigned to it, or I should create a new one by disposing this image?</p>