feat: set up monorepo scaffold with Yarn workspaces, Django API, React/Vite web, and Docker Compose

- Root package.json with Yarn workspaces (web, api)
- /web: React 19 + Vite 6 + @vitejs/plugin-react
  - index.html, src/main.jsx, src/App.jsx, vite.config.js
- /api: Django 5.x managed with uv
  - pyproject.toml with Django + psycopg2-binary
  - project/settings.py with PostgreSQL config from DATABASE_URL
  - project/urls.py, project/wsgi.py, manage.py
- docker-compose.yml with db (postgres:15), api, web services
  - Health check for db, live code volumes, dependency ordering
- Dockerfiles for both web (node:20-alpine) and api (python:3.12-slim)
- .gitignore updated for Python build artifacts and venv
- docs/implementation-issue-1-monorepo-scaffold.md

api/project/settings.py

@@ -0,0 +1,78 @@
+import os
+from pathlib import Path
+
+BASE_DIR = Path(__file__).resolve().parent.parent
+
+SECRET_KEY = os.environ.get(
+    "DJANGO_SECRET_KEY",
+    "django-insecure-change-me-in-production",
+)
+
+DEBUG = os.environ.get("DJANGO_DEBUG", "True").lower() in ("true", "1", "yes")
+
+ALLOWED_HOSTS: list[str] = ["*"]
+
+INSTALLED_APPS = [
+    "django.contrib.contenttypes",
+    "django.contrib.auth",
+]
+
+MIDDLEWARE = [
+    "django.middleware.security.SecurityMiddleware",
+    "django.contrib.sessions.middleware.SessionMiddleware",
+    "django.middleware.common.CommonMiddleware",
+    "django.middleware.csrf.CsrfViewMiddleware",
+    "django.contrib.auth.middleware.AuthenticationMiddleware",
+    "django.middleware.clickjacking.XFrameOptionsMiddleware",
+]
+
+ROOT_URLCONF = "project.urls"
+
+TEMPLATES = [
+    {
+        "BACKEND": "django.template.backends.django.DjangoTemplates",
+        "DIRS": [],
+        "APP_DIRS": True,
+        "OPTIONS": {
+            "context_processors": [
+                "django.template.context_processors.debug",
+                "django.template.context_processors.request",
+                "django.contrib.auth.context_processors.auth",
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = "project.wsgi.application"
+
+# Parse DATABASE_URL
+_database_url = os.environ.get(
+    "DATABASE_URL",
+    "postgres://jobtracker:jobtracker@localhost:5432/jobtracker",
+)
+
+# postgres://user:password@host:port/dbname → django settings dict
+_db_parts = _database_url.replace("postgres://", "").split("@")
+_credentials, _host_db = _db_parts[0], _db_parts[1]
+_db_user, _db_pass = _credentials.split(":")
+_host_port, _db_name = _host_db.split("/")
+_db_host = _host_port.split(":")[0]
+_db_port = _host_port.split(":")[1] if ":" in _host_port else "5432"
+
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": _db_name,
+        "USER": _db_user,
+        "PASSWORD": _db_pass,
+        "HOST": _db_host,
+        "PORT": _db_port,
+    }
+}
+
+LANGUAGE_CODE = "en-us"
+TIME_ZONE = "UTC"
+USE_I18N = True
+USE_TZ = True
+
+DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"