seo (#17)

SEO implementation, adds a structured data response and robots.txt, fixes page structure, adds meta tags, add elements to UI for better SEO as well.

Reviewed-on: #17
Co-authored-by: Michael DiLeo <michael_dileo@proton.me>
Co-committed-by: Michael DiLeo <michael_dileo@proton.me>

nginx.conf

@@ -16,6 +16,7 @@ http {
     
     include /etc/nginx/mime.types;
     default_type application/octet-stream;
+    charset utf-8;
     
     access_log /dev/stdout;
     error_log /dev/stderr;
@@ -56,6 +57,11 @@ http {
         #     add_header Pragma "no-cache";
         #     add_header Expires "0";
         }
+
+        location ~* \.json$ {
+            expires 1d;
+            add_header Cache-Control "public, must-revalidate";
+        }
         
         location /health {
             access_log off;