[#45] Fix loading CSS files in docker image

CSS files were not loaded in docker image. It is not well solved but could be solved when switching to different build tools (e.g. webpack --> vite)

nginx.conf

@@ -34,6 +34,11 @@
          # what file to server as index
          index index.html index.htm;
 
+         # TODO not very systematic solution
+         location ~ ^/(main|s-forms)\.css$ {
+            root /var/www/public;
+         }
+
          location / {
              # First attempt to serve request as file, then
              # as directory, then fall back to redirecting to index.html