Stabilize PR CI and harden compose startup

docker-compose.yml

@@ -1,6 +1,7 @@
 services:
   web:
     build: .
+    working_dir: /app
     command: python manage.py runserver 0.0.0.0:8000
     volumes:
       - .:/app
@@ -19,7 +20,8 @@ services:
       DEFAULT_FROM_EMAIL: hello@nohypeai.com
       NEWSLETTER_PROVIDER: buttondown
     depends_on:
-      - db
+      db:
+        condition: service_healthy
 
   db:
     image: postgres:16-alpine
@@ -29,6 +31,12 @@ services:
       POSTGRES_PASSWORD: nohype
     volumes:
       - nohype_pg:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U nohype -d nohype"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+      start_period: 5s
 
 volumes:
   nohype_pg: