Added healthcheck page

- used in ELB healthchecks

app/status/__init__.py

@@ -0,0 +1,5 @@
+from flask import Blueprint
+
+status = Blueprint('status', __name__)
+
+from app.status.views import healthcheck

app/status/views/healthcheck.py

@@ -0,0 +1,10 @@
+from flask import jsonify
+
+from app.status import status
+
+
+@status.route('/_status')
+def status():
+    return jsonify(
+        status="ok",
+    ), 200