fix(origin): serve port 80 instead of redirecting to a certificate nobody can verify

nginx/moshpit-origin.conf

@@ -18,11 +18,44 @@ server {
     listen [::]:80;
     server_name NAME;
 
-    # Keep this. Upgrading to HTTPS is right, and it was only ever a problem
-    # when there was no 443 block for the name to land on — which produced a
-    # certificate for whatever the default vhost happened to hold, and an error
-    # that looks like Moshpit is broken when it is nginx that is misconfigured.
-    return 301 https://$host$request_uri;
+    # This used to redirect to HTTPS, with a comment saying the only problem
+    # was a missing 443 block. That reasoning was incomplete: it assumes the
+    # client can verify what it lands on, and the two biggest classes cannot.
+    #
+    # No CA will issue for an ending outside the DNS root, so the 443 block
+    # below presents a self-signed certificate. TronBrowser, moshpit-proxy and
+    # the SDKs check it against the registry's published pin and are happy.
+    # `curl` and a stock browser have no pin to check against, so they reject
+    # it — and a redirect gives them no way back:
+    #
+    #     curl chovy.hacker -L
+    #     curl: (60) SSL certificate problem: self-signed certificate
+    #
+    # Through the gateway it is worse. pit.moshcode.sh forwards the status and
+    # not the Location, so a visitor gets a 301 pointing nowhere at all.
+    #
+    # So port 80 serves the site instead. Both ports now serve it, neither
+    # redirects to the other, and each client takes the one it can verify —
+    # pin-checking clients still get TLS, and everyone else gets the page
+    # rather than an error that reads as "Moshpit is broken".
+    #
+    # HTTPS-only is still the right default for a name in the public DNS. It
+    # is not available for a name outside it, and pretending otherwise costs
+    # the visitor the site.
+
+    access_log /var/log/nginx/NAME.access.log;
+    error_log  /var/log/nginx/NAME.error.log warn;
+
+    root /var/www/NAME;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ =404;
+    }
+
+    location ~ /\. {
+        deny all;
+    }
 }
 
 server {