fix: only allow image files to be chosen

src/common/server_icon.rs

@@ -286,9 +286,19 @@ pub mod update_icon {
   fn logos_filter(festival_data: &FestivalData, existing: Vec<LogoData>) -> Vec<LogoData> {
     let mut filtered: Vec<LogoData> = vec![];
 
+    let allowed_files = vec![".png", ".jpeg", ".gif", ".svg"];
     'outer: for logo in existing {
       let name_lowercase0 = logo.name.to_ascii_lowercase();
       let name_lowercase = name_lowercase0.to_str().unwrap_or_default();
+      let mut allowed = false;
+      for allowed_type in &allowed_files {
+        if name_lowercase.ends_with(allowed_type) {
+          allowed = true;
+        }
+      }
+      if !allowed {
+        continue;
+      }
 
       if !festival_data.current.is_empty() {
         // if its a current festival filter based on it