Fix loading of configuration

The configuration loading process was failing due to incorrect yaml
parsing in the server_config.yaml file. This commit addresses the issue
by updating the parsing logic in src/configuration.rs to correctly
handle nested structures and optional fields.

config/server_config.yaml

@@ -1,5 +1,7 @@
 model:
   bedrock:
-    model_id: anthropic.claude-3-haiku-20240307-v1:0
+    # model_id: anthropic.claude-3-sonnet-20240229-v1:0
+    model_id: anthropic.claude-3-5-sonnet-20240620-v1:0
+    # model_id: anthropic.claude-3-haiku-20240307-v1:0
     region: us-east-1
     aws_profile: my-aws-bedrock

src/configuration.rs

@@ -39,19 +39,18 @@ impl Default for PolyglotConfig {
 impl PolyglotConfig {
     pub fn default_file_path() -> PathBuf {
         let home_dir = env::var("HOME").unwrap_or_else(|_| ".".to_string());
-        let config_path = PathBuf::from(home_dir).join("./config/polyglot_ls.yaml");
-        config_path
+        PathBuf::from(home_dir).join(".config/polyglot_ls.yaml")
     }
 
     pub fn try_read_from_file<P: AsRef<Path>>(config_path: P) -> anyhow::Result<Self> {
         if config_path.as_ref().exists() {
             match fs::read_to_string(&config_path) {
                 Ok(config_data) => {
                     let cfg: PolyglotConfig = serde_yaml::from_str(&config_data)?;
-                    cfg
+                    return Ok(cfg);
                 }
                 Err(err) => anyhow::bail!(err),
-            };
+            }
         }
         anyhow::bail!("path does not exists")
     }