Add STROJNADZOR_DATA_DIR environment variable

src/strojnadzor/settings.py

@@ -1,7 +1,3 @@
-import os  # isort:skip
-
-gettext = lambda s: s
-DATA_DIR = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
 """
 Django settings for strojnadzor project.
 
@@ -14,7 +10,14 @@ For the full list of settings and their values, see
 https://docs.djangoproject.com/en/2.2/ref/settings/
 """
 
-import os
+import os  # isort:skip
+
+gettext = lambda s: s
+
+if "STROJNADZOR_DATA_DIR" in os.environ:
+    DATA_DIR = os.environ["STROJNADZOR_DATA_DIR"]
+else:
+    DATA_DIR = os.getcwd()
 
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
@@ -198,7 +201,7 @@ DATABASES = {
         "CONN_MAX_AGE": 0,
         "ENGINE": "django.db.backends.sqlite3",
         "HOST": "localhost",
-        "NAME": "project.db",
+        "NAME": os.path.join(DATA_DIR, "project.db"),
         "PASSWORD": "",
         "PORT": "",
         "USER": "",