[Multi-User Part 4]: Authenticate using API Tokens (#513)

### ✨ New
- Use API keys to authenticate from Desktop, Obsidian, Emacs clients
- Create API, UI on web app config page to CRUD API Keys
- Create user API keys table and functions to CRUD them in Database

### 🧪 Improve
- Default to better search model, [gte-small](https://huggingface.co/thenlper/gte-small), to improve search quality
- Only load chat model to GPU if enough space, throw error on load failure
- Show encoding progress, truncate headings to max chars supported
- Add instruction to create db in Django DB setup Readme

### ⚙️ Fix
- Fix error handling when configure offline chat via Web UI
- Do not warn in anon mode about Google OAuth env vars not being set
- Fix path to load static files when server started from project root

src/app/README.md

@@ -37,6 +37,12 @@ make install # may need sudo
 ```
 3. Create a database
 
+### Create the khoj database
+
+```bash
+createdb khoj -U postgres
+```
+
 ### Make migrations
 
 This command will create the migrations for the database app. This command should be run whenever a new model is added to the database app or an existing model is modified (updated or deleted).

src/app/settings.py

@@ -14,7 +14,7 @@ from pathlib import Path
 import os
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
-BASE_DIR = Path(__file__).resolve().parent.parent
+BASE_DIR = Path(__file__).resolve().parent.parent.parent
 
 
 # Quick-start development settings - unsuitable for production
@@ -123,8 +123,8 @@ USE_TZ = True
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/4.2/howto/static-files/
 
-STATIC_ROOT = os.path.join(BASE_DIR, "static")
-STATICFILES_DIRS = [os.path.join(BASE_DIR, "khoj/interface/web")]
+STATIC_ROOT = BASE_DIR / "static"
+STATICFILES_DIRS = [BASE_DIR / "src/khoj/interface/web"]
 STATIC_URL = "/static/"
 
 # Default primary key field type

src/app/urls.py

@@ -15,7 +15,7 @@ Including another URLconf
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
 from django.contrib import admin
-from django.urls import path, include
+from django.urls import path
 from django.contrib.staticfiles.urls import staticfiles_urlpatterns
 
 urlpatterns = [