Implement Monlet MVP stack and UI updates

deploy/showcase/checks/exit_0.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "ok: $(date -u +%FT%TZ)"
+exit 0

deploy/showcase/checks/exit_1.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "warning: degraded"
+exit 1

deploy/showcase/checks/exit_2.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "critical: probe failed"
+exit 2

deploy/showcase/checks/exit_3.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "unknown: probe returned unexpected exit code"
+exit 3

deploy/showcase/checks/flapping.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+# critical until /state/resolve.flag exists, then ok.
+if [ -f /state/resolve.flag ]; then
+  echo "ok: resolve flag present"
+  exit 0
+fi
+echo "critical: waiting for resolve flag"
+exit 2

deploy/showcase/checks/replay_check.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+echo "ok: replay tick"
+exit 0