Add contact email to server configuration

src/api_data/server_config.rs

@@ -68,6 +68,7 @@ pub struct ServerConfig {
     min_supported_mobile_version: &'static str,
     terms_url: &'static str,
     privacy_policy_url: &'static str,
+    contact_email: &'static str,
     play_store_url: &'static str,
     android_direct_download_url: String,
 
@@ -84,6 +85,7 @@ impl ServerConfig {
             min_supported_mobile_version: MIN_SUPPORTED_MOBILE_VERSION,
             terms_url: &conf().terms_url,
             privacy_policy_url: &conf().privacy_policy_url,
+            contact_email: &conf().contact_email,
             play_store_url: &conf().play_store_url,
             android_direct_download_url: conf().android_direct_download_url.clone(),