don't use 80 and 443 ports in both nginx and app

data/nginx/app.conf

@@ -1,3 +1,6 @@
+upstream personal_api {
+    server app:8001;
+}
 server {
     listen 80;
     server_name api.averba.ch;    location / {

docker-compose.yml

@@ -30,10 +30,9 @@ services:
       - ./.env.prod
     volumes:
       - ./:/personal_api/
-    command: gunicorn -w 4 -k uvicorn.workers.UvicornWorker personal_api.main:app -b 0.0.0.0
+    command: gunicorn -w 4 -k uvicorn.workers.UvicornWorker personal_api.main:app -b 0.0.0.0:8001
-    ports:
+    expose:
-      - "80:80"
+      - 8001
-      - "443:443"
     networks:
       my-network:
         aliases: