Use sqlite3 as the default backend since it requires no configuration.

The sqlite3 databaes named coin.sqlite3 will be created so we ignore this file.

.gitignore

@@ -12,3 +12,4 @@ coin/settings_local.py
 /smedia
 .idea
 venv
+/coin.sqlite3

coin/settings.py

@@ -21,10 +21,10 @@ MANAGERS = ADMINS
 DATABASES = {
     # Base de donnée du SI
     'default': {
-        'ENGINE': 'django.db.backends.postgresql_psycopg2',
-        'NAME': 'coin',
-        'USER': 'coin',
-        'PASSWORD': '',
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': 'coin.sqlite3',
+        'USER': '', # Not needed for SQLite
+        'PASSWORD': '', # Not needed for SQLite
         'HOST': '',  # Empty for localhost through domain sockets
         'PORT': '',  # Empty for default
     },