feat: Error pages + Makefile improvements

Error pages: Add error pages for 404 and 50X errors by nginx
Makefile improvements: Remove shit.sh and replace it by improving the
Makefile

server/nginx.conf

@@ -34,6 +34,20 @@ http {
             gzip on;
             gzip_min_length 256K;
 
+           
+            error_page 404 /lost.html;
+            error_page 500 502 503 504 /error.html;
+
+            # Status page for 404
+            location = /error.html {
+                     root /srv/www;
+            }
+
+            # Status page for 50X
+            location = /lost.html {
+                     root /srv/www;
+            }
+
             # Reverse Proxy
             location /api/ {
                      # Seems weird, but it is (Prevent /api/api/)