Add example file for Nextcloud.

Config/ReverseProxy/config/conf.d/cloud.example.com

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+# 2025-01-02 Hyperling
+# A dummy test file since true scripts are being kept private.
+# This should help others understand how to get Nextcloud working.
+
+## Instructions ##
+# Add this without the comment to your /etc/hosts to test that it is working,
+#   YOUR_DOCKER_SERVER_IP cloud.example.com
+# If testing locally on a workstation,
+#   127.0.0.1 cloud.example.com
+# Then to test, first start the container,
+#   cd $DOCKER_HOME/Config/ReverseProxy && docker compose build && docker compose up -d
+# Then from the system with the modified /etc/hosts,
+#   curl --insecure cloud.example.com
+# You should see activity in the container log as well as the contents of the
+# proxied website in the terminal, NOT cloud.example.com. If using a browser then you
+# should notice that the URL is still cloud.example.com but the website is correct.
+
+server {
+    listen 80;
+    server_name cloud.example.com;
+
+    location /.well-known/acme-challenge/ {
+        default_type "text/plain";
+        root /etc/nginx/letsencrypt/;
+    }
+
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}
+
+server {
+    listen 443 ssl;
+    server_name cloud.example.com;
+
+    ssl_certificate /etc/nginx/certs/cloud.example.com/fullchain.pem; # managed by Certbot
+    ssl_certificate_key /etc/nginx/certs/cloud.example.com/privkey.pem; # managed by Certbot
+
+    # https://docs.nextcloud.com/server/latest/admin_manual/configuration_server/reverse_proxy_configuration.html#nginx
+    rewrite ^/\.well-known/carddav https://$server_name/remote.php/dav/ redirect;
+    rewrite ^/\.well-known/caldav https://$server_name/remote.php/dav/ redirect;
+
+    location /.well-known/acme-challenge/ {
+        default_type "text/plain";
+        root /etc/nginx/letsencrypt/;
+    }
+
+    # Attempt to make OnlyOffice work both internally and externally.
+    # https://helpcenter.onlyoffice.com/installation/docs-nextcloud-proxy.aspx
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection $proxy_connection;
+    proxy_set_header X-Forwarded-Host $http_host/office;
+
+    # Send traffic to upstream server
+    location / {
+        expires epoch;
+        add_header Pragma public;
+        add_header Cache-Control "private, no-store";
+        add_header Strict-Transport-Security "max-age=15552000; includeSubDomains; preload";
+
+        # Fix upload errors (HTTP Error: Request Entity Too Large).
+        client_max_body_size 0;
+        client_body_buffer_size 100M;
+
+        # Attempt to make OnlyOffice work both internally and externally.
+        # https://helpcenter.onlyoffice.com/installation/docs-nextcloud-proxy.asp
+        proxy_pass_header Server;
+        proxy_pass http://hyperling-cloud;
+    }
+
+    # Attempt to make OnlyOffice work both internally and externally.
+    # https://helpcenter.onlyoffice.com/installation/docs-nextcloud-proxy.aspx
+    location /office/ {
+       proxy_pass http://hyperling-office-http;
+    }
+}