Revert "fix(docker): use a tunable for fastapi proxy host value"

This reverts commit 32b4f75f01.

docker-compose.aur-dev.yml

@@ -69,8 +69,6 @@ services:
       - data:/data
 
   nginx:
-    environment:
-      - NGINX_PROXY_PORT=443
     restart: always
     volumes:
       - data:/data

docker-compose.yml

@@ -244,8 +244,7 @@ services:
     image: aurweb:latest
     init: true
     environment:
-      # Proxy toward FastAPI.
-      - NGINX_PROXY_PORT=8444
+      - AUR_CONFIG=conf/config
     entrypoint: /docker/nginx-entrypoint.sh
     command: /docker/scripts/run-nginx.sh
     ports:

docker/config/nginx.conf

@@ -136,7 +136,7 @@ http {
 
         location / {
             proxy_pass http://asgi_backend;
-            proxy_set_header Host HTTP_HOST;
+            proxy_set_header Host $http_host;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
             proxy_set_header X-Forwarded-Proto $scheme;
             proxy_set_header X-Forwarded-Ssl on;

docker/nginx-entrypoint.sh

@@ -21,8 +21,4 @@ fi
 
 cp -vf /docker/config/nginx.conf /etc/nginx/nginx.conf
 
-# NGINX_PROXY_PORT must be defined for the `nginx` service
-# within `docker-compose.yml`.
-sed -i "s|HTTP_HOST|\$host:${NGINX_PROXY_PORT}|g" /etc/nginx/nginx.conf
-
 exec "$@"