Add ingress support with nginx reverse proxy for maintainerr addon

Agent-Logs-Url: https://github.com/alexbelgium/hassio-addons/sessions/14f6643d-9d4f-4c6d-8993-0dbe4404c35d

Co-authored-by: alexbelgium <44178713+alexbelgium@users.noreply.github.com>

maintainerr/rootfs/etc/nginx/servers/ingress.conf

@@ -0,0 +1,61 @@
+server {
+    listen %%interface%%:%%port%% default_server;
+    include /etc/nginx/includes/server_params.conf;
+    include /etc/nginx/includes/proxy_params.conf;
+
+    proxy_buffering off;
+    gzip_static off;
+    client_max_body_size 0;
+
+    # Based on https://docs.maintainerr.info/ReverseProxy/#nginx-subdomain
+    location / {
+        set $app '%%ingress_entry%%';
+
+        rewrite ^%%ingress_entry%%/?(.*)$ /$1 break;
+        proxy_pass http://127.0.0.1:6246;
+
+        # WebSocket support
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+
+        proxy_hide_header X-Powered-By;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header Accept-Encoding "";
+        proxy_read_timeout 90;
+        add_header X-Frame-Options "SAMEORIGIN";
+        add_header 'Referrer-Policy' 'no-referrer';
+
+        # Redirect location headers
+        absolute_redirect off;
+        proxy_redirect / $app/;
+
+        # Sub filters to rewrite URLs in responses
+        sub_filter_once off;
+        sub_filter_types *;
+
+        # HTML attribute rewrites
+        sub_filter 'href="/"' 'href="%%ingress_entry%%/"';
+        sub_filter 'src="/' 'src="%%ingress_entry%%/';
+        sub_filter 'action="/' 'action="%%ingress_entry%%/';
+
+        # API path rewrites
+        sub_filter '"/api' '"%%ingress_entry%%/api';
+        sub_filter '`/api' '`%%ingress_entry%%/api';
+        sub_filter "'/api" "'%%ingress_entry%%/api";
+
+        # Vite asset rewrites
+        sub_filter '"/assets' '"%%ingress_entry%%/assets';
+        sub_filter '`/assets' '`%%ingress_entry%%/assets';
+        sub_filter "'/assets" "'%%ingress_entry%%/assets";
+
+        # Favicon and static files
+        sub_filter '"/favicon' '"%%ingress_entry%%/favicon';
+        sub_filter '"/logo' '"%%ingress_entry%%/logo';
+
+        # Root path references in JavaScript
+        sub_filter '"\/"' '"%%ingress_entry%%\/"';
+    }
+}