Update port configuration and Nginx settings

Author: getGit789

.ebextensions/01_application.config

@@ -1,3 +1,43 @@
 option_settings:
   aws:elasticbeanstalk:container:python:
     WSGIPath: application:application
+  aws:elasticbeanstalk:application:environment:
+    PORT: 8000
+  aws:elasticbeanstalk:environment:proxy:
+    ProxyServer: nginx
+  aws:elasticbeanstalk:environment:process:default:
+    Port: 8000
+    Protocol: HTTP
+
+files:
+  "/etc/nginx/conf.d/proxy.conf":
+    mode: "000644"
+    owner: root
+    group: root
+    content: |
+      upstream backend {
+        server 127.0.0.1:8000;
+      }
+      
+      server {
+        listen 80;
+        
+        location / {
+          proxy_pass http://backend;
+          proxy_set_header Host $host;
+          proxy_set_header X-Real-IP $remote_addr;
+          
+          if ($request_method = 'OPTIONS') {
+            add_header 'Access-Control-Allow-Origin' '*';
+            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
+            add_header 'Access-Control-Allow-Headers' '*';
+            add_header 'Content-Type' 'text/plain charset=UTF-8';
+            add_header 'Content-Length' 0;
+            return 204;
+          }
+          
+          add_header 'Access-Control-Allow-Origin' '*' always;
+          add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' always;
+          add_header 'Access-Control-Allow-Headers' '*' always;
+        }
+      }

Procfile

@@ -1 +1 @@
-web: gunicorn application:application --bind 0.0.0.0:80 -k uvicorn.workers.UvicornWorker
+web: gunicorn application:application --bind 0.0.0.0:8000 -k uvicorn.workers.UvicornWorker