fix(adventurelog): healthcheck + SECRET_KEY for v0.11.0

Backend: wget missing from image, use python urllib instead.
Frontend: localhost resolves to IPv6, use 127.0.0.1.
Backend: add SECRET_KEY env var (v0.11.0 reads it directly).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

templates/adventurelog/docker-compose.yml

@@ -18,6 +18,7 @@ services:
         condition: service_healthy
     environment:
       - DJANGO_SECRET_KEY=${SECRET_KEY}
+      - SECRET_KEY=${SECRET_KEY}
       - PGHOST=adventurelog-postgres
       - PGDATABASE=adventurelog
       - PGUSER=adventurelog
@@ -34,9 +35,9 @@ services:
         limits:
           memory: 384M
     healthcheck:
-      test: ["CMD", "wget", "--spider", "-q", "http://localhost:8000/api/"]
+      test: ["CMD-SHELL", "python -c 'import urllib.request; urllib.request.urlopen(\"http://127.0.0.1:8000/api/\")'"]
       interval: 30s
-      timeout: 5s
+      timeout: 10s
       retries: 3
       start_period: 30s
   adventurelog-postgres:
@@ -86,7 +87,7 @@ services:
         limits:
           memory: 256M
     healthcheck:
-      test: ["CMD", "wget", "--spider", "-q", "http://localhost:3000"]
+      test: ["CMD", "wget", "--spider", "-q", "http://127.0.0.1:3000"]
       interval: 10s
       timeout: 5s
       retries: 5