reorganize template processor, implement new server options, optimize component init arguments

src/config.rs

@@ -23,14 +23,37 @@ pub struct Config {
     #[arg(short, long, default_value_t = String::from("ei"))]
     pub debug: String,
 
-    /// Absolute path to the template files directory
-    #[arg(short, long)]
-    pub template: Option<String>,
-
     /// Absolute path to the public files directory
     #[arg(short, long)]
     pub public: String,
 
+    /// Absolute path to the `Access denied` template file
+    #[arg(long)]
+    pub template_access_denied: Option<String>,
+
+    /// Absolute path to the `Internal server error` template file
+    #[arg(long)]
+    pub template_internal_server_error: Option<String>,
+
+    /// Absolute path to the `Not found` template file
+    #[arg(long)]
+    pub template_not_found: Option<String>,
+
+    /// Absolute path to the `Welcome` template file.
+    /// Unlike `template_index`, this applies only to the `public` location
+    ///
+    /// **Patterns**
+    /// * `{list}` - entries list for the `public` directory
+    #[arg(long)]
+    pub template_welcome: Option<String>,
+
+    /// Absolute path to the `Index` template file for each directory
+    ///
+    /// **Patterns**
+    /// * `{list}` - entries list for the current directory
+    #[arg(long)]
+    pub template_index: Option<String>,
+
     /// Optimize memory usage on reading large files or stream
     #[arg(short, long, default_value_t = 1024)]
     pub read_chunk: usize,