fix(glitchtip): healthcheck via python3 /_health/ — image has no wget (#644)

glitchtip/glitchtip:6.1.6 ships neither wget nor curl (only python3), so the
existing `wget --spider http://localhost:8080/api/0/` healthcheck failed on a
missing binary → container reported unhealthy forever. (wget --spider also
HEADs /api/0/, which GlitchTip 405s — "Method Not Allowed" in logs.)

Replace with the canonical /_health/ endpoint (GET → 200) probed via the
built-in python3. Verified live: the exact CMD exits 0 in the running
container. Nothing depends_on glitchtip-web's health, so this only fixes the
false-unhealthy status (no startup gating change).

docker-compose.prod.yml

@@ -160,10 +160,13 @@ services:
       ENABLE_ORGANIZATION_CREATION: "false"
     restart: always
     mem_limit: 512m
+    # Образ glitchtip:6.1.6 НЕ содержит wget/curl (только python3) → старый
+    # wget-healthcheck падал на missing-binary → контейнер вечно unhealthy (#644).
+    # Пробуем канонический /_health/ (GET → 200) через встроенный python3.
     healthcheck:
-      test: ["CMD", "wget", "-q", "--spider", "http://localhost:8080/api/0/"]
+      test: ["CMD", "python3", "-c", "import urllib.request,sys; sys.exit(0 if urllib.request.urlopen('http://localhost:8080/_health/', timeout=8).status == 200 else 1)"]
       interval: 30s
-      timeout: 5s
+      timeout: 10s
       retries: 5
       start_period: 60s
     networks: [default]