add entrypoint.sh (auto migrate)

README.md

@@ -1312,6 +1312,8 @@ docker-compose up
 
 ![](https://i.imgur.com/iuCxLMY.png)
 
+:exclamation: 已經更新為自動 migrate:exclamation:
+
 但你仔細看上圖，你會發現他說你還沒 migrate
 
 接下來我們開啟另一個 cmd 進入 web 的 service，
@@ -1334,6 +1336,12 @@ python manage.py migrate
 
 ![](https://i.imgur.com/zMmZKuL.png)
 
+:exclamation: 已經更新為自動建立:exclamation:
+
+請參考 [docker-compose.yml](https://github.com/twtrubiks/docker-tutorial/blob/master/docker-compose.yml) 中的 environment ( 如下 ),
+
+`DJANGO_SUPERUSER_USERNAME` `DJANGO_SUPERUSER_PASSWORD` `DJANGO_SUPERUSER_EMAIL`
+
 順便在建立一個 superuser
 
 ```cmd

api/Dockerfile

@@ -6,3 +6,5 @@ WORKDIR /docker_api
 COPY . /docker_api/
 RUN pip install -r requirements.txt
 
+# for entry point
+RUN chmod +x /docker_api/docker-entrypoint.sh

api/docker-entrypoint.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+echo 'Run migration'
+python3 manage.py makemigrations musics
+python3 manage.py migrate
+echo 'Create Super User'
+python3 manage.py createsuperuser --noinput || echo "Super user already created"
+exec "$@"

docker-compose.yml

@@ -21,8 +21,17 @@ services:
 
     web:
       build: ./api
+      entrypoint: /docker_api/docker-entrypoint.sh
       command: python manage.py runserver 0.0.0.0:8000
       restart: always
+
+      # ref.
+      # https://docs.djangoproject.com/en/3.0/ref/django-admin/#django-admin-createsuperuser
+      environment:
+        - DJANGO_SUPERUSER_USERNAME=admin
+        - DJANGO_SUPERUSER_PASSWORD=admin1234
+        - DJANGO_SUPERUSER_EMAIL=admin@twtrubiks.com
+
       volumes:
         - api_data:/docker_api
         # (HOST:CONTAINER)