Initial deploy setup

apps/core/health.py

@@ -0,0 +1,29 @@
+from __future__ import annotations
+
+from dataclasses import asdict, dataclass
+
+from django.db import connections
+from django.db.utils import OperationalError
+
+
+@dataclass(frozen=True)
+class HealthResult:
+    ok: bool
+    checks: dict[str, str]
+
+    def to_dict(self) -> dict[str, object]:
+        return asdict(self)
+
+
+def readiness() -> HealthResult:
+    checks: dict[str, str] = {}
+    ok = True
+    try:
+        with connections["default"].cursor() as cursor:
+            cursor.execute("SELECT 1")
+            cursor.fetchone()
+        checks["database"] = "ok"
+    except OperationalError as exc:
+        ok = False
+        checks["database"] = f"error:{exc.__class__.__name__}"
+    return HealthResult(ok=ok, checks=checks)