Fix contact email typo and scrub infra details from README

- ilia@levkine.ca -> ilia@levkin.ca in spec and stack-folder pages
- Remove LAN IPs, ssh/pct commands from README deploy section
- Ignore *.zip artifacts

spec/index.html

@@ -24,7 +24,7 @@
       "name": "Levkin Inc.",
       "url": "https://levkin.ca/",
       "description": "Custom software, automation, and AI workflows for production systems.",
-      "email": "ilia@levkine.ca",
+      "email": "ilia@levkin.ca",
       "areaServed": ["North America", "Europe"],
       "sameAs": [
         "https://auto.levkin.ca/",
@@ -207,7 +207,7 @@
               </tr>
               <tr>
                 <th scope="row">Correspondence</th>
-                <td><a href="mailto:ilia@levkine.ca?subject=Project%20enquiry">ilia@levkine.ca</a></td>
+                <td><a href="mailto:ilia@levkin.ca?subject=Project%20enquiry">ilia@levkin.ca</a></td>
               </tr>
             </tbody>
           </table>