Fix use of variables

* Wasn't using static_root and media_root properly: nginx was unaware of
  the folders (unless the hardcoded name "static" or "media" was used)
* There is a difference between the project name (of your choosing,
  which will be used to name folders in the server) and the name of the
  django project (the one gunicorn will use to call you project). We now
  differentiate both.

templates/docker-compose.yml

@@ -3,11 +3,11 @@ version: '3.8'
 services:
   web:
     build: .
-    command: gunicorn {{ project_name }}.wsgi:application --bind 0.0.0.0:8000
+    command: gunicorn {{ django_project_name }}.wsgi:application --bind 0.0.0.0:8000
     volumes:
       - ./{{ project_name}}/:/usr/src/{{ project_name }}/
-      - static_volume:/usr/src/{{ project_name }}/static
-      - media_volume:/usr/src/{{ project_name }}/media
+      - static_volume:/usr/src/{{ project_name }}/{{ static_foler }}
+      - media_volume:/usr/src/{{ project_name }}/{{ media_folder }}
     expose:
       - 8000
     env_file:
@@ -25,8 +25,8 @@ services:
   nginx:
     build: ./nginx
     volumes:
-      - static_volume:/usr/src/{{ project_name }}/static
-      - media_volume:/usr/src/{{ project_name }}/media
+      - static_volume:/usr/src/{{ project_name }}/{{ static_folder }}
+      - media_volume:/usr/src/{{ project_name }}/{{ media_folder }}
     ports:
       - {{ nginx_exposed_port }}:80
     depends_on:

vars.yml.example

@@ -5,7 +5,8 @@ server_user: user
 nginx_exposed_port: 1337
 
 # Project configuration
-project_name: app
+project_name: app # Choose arbitrarily
+django_project_name # Must be the same as in django configuration
 git_repo: https://github.com/myself/app
 git_branch: main
 debug: 0