fix: revert nginx config back (#2011)

Related: #1997

Author: B4nan

nginx.conf

@@ -1,73 +1,12 @@
-# Map Accept headers to Markdown flag
-map $http_accept $wants_markdown {
-    default 0;
-    "~*text/markdown" 1;
-    "~*text/plain"    1;
-}
-
-# Define named upstream for local dev
-upstream local_docs {
-    server 127.0.0.1:3000;
-}
-
-# Map host to upstream
-map $host $docs_upstream {
-    "docs.apify.com" https://apify.github.io/apify-docs;  # production
-    default          http://local_docs;                  # local dev
-}
-
 server {
     listen 0.0.0.0:8080;
-    server_name docs.apify.loc docs.apify.com;
+    server_name docs.apify.com;
 
-    # Homepage: llms.txt fallback
     location = / {
-        if ($wants_markdown) {
-            rewrite ^ /__proxy/llms.txt last;
-        }
-        proxy_pass $docs_upstream;
-        proxy_redirect https://apify.github.io/ https://apify.github.io/apify-docs/;
-    }
-
-    # Direct llms.txt files
-    location = /llms.txt {
-        proxy_pass $docs_upstream/llms.txt;
-        proxy_hide_header Content-Type;
-        add_header Content-Type "text/markdown; charset=utf-8" always;
-        proxy_redirect https://apify.github.io/ https://apify.github.io/apify-docs/;
-    }
-
-    location = /llms-full.txt {
-        proxy_pass $docs_upstream/llms-full.txt;
-        proxy_hide_header Content-Type;
-        add_header Content-Type "text/markdown; charset=utf-8" always;
-        proxy_redirect https://apify.github.io/ https://apify.github.io/apify-docs/;
-    }
-
-    # Generic Markdown fallback for all URLs
-    location / {
-        if ($wants_markdown) {
-            # rewrite clean URLs or URLs ending in .md to internal proxy
-            rewrite ^(/.*\.md)$ /__proxy$1 last;       # already .md
-            rewrite ^(/.*[^/.])$ /__proxy$1.md last;   # no extension
-        }
-        proxy_pass $docs_upstream;
-        proxy_redirect https://apify.github.io/ https://apify.github.io/apify-docs/;
-    }
-
-    # Internal proxy for Markdown handling
-    location ^~ /__proxy/ {
-        internal;
-        rewrite ^/__proxy/(.*)$ /$1 break;
-
-        proxy_pass $docs_upstream;
-        proxy_hide_header Content-Type;
-        add_header Content-Type "text/markdown; charset=utf-8" always;
-
-        proxy_redirect https://apify.github.io/ https://apify.github.io/apify-docs/;
+        proxy_pass https://apify.github.io/apify-docs/;
     }
 
-  # proxies to other repositories
+    # proxies to other repositories
     location /api/client/js {
         proxy_pass https://apify.github.io/apify-client-js/;
     }