docs: Enhance project documentation and cleanup codebase

- Added a Configuration section and example configuration file to README.md
- Improved README.md structure by removing unnecessary text
- Refactored main.py to remove redundant lines in install_config function

README.md

@@ -100,6 +100,31 @@ graph TD
 
    The application will transcribe each audio file in the input directory and save the transcriptions to the output directory. It will also generate summaries of the transcriptions using the configured models and save them to the output directory.
 
+## :gear: Configuration
+
+The application uses a configuration file (`.transcribe.yaml`) to specify settings such as input/output directories, API keys, models, and their configurations. The configuration file is created automatically when you run the `transcribe-me install` command.
+
+Here is an example configuration file:
+
+```yaml
+openai:
+  models:
+    - temperature: 0.1
+      max_tokens: 2048
+      model: gpt-4
+      system_prompt: Generate a summary with key points in bold and a Next Steps section, use Markdown, be a concise tech expert but kind to non-technical readers.
+
+anthropic:
+  models:
+    - temperature: 0.8
+      max_tokens: 2048
+      model: claude-3-sonnet-20240229
+      system_prompt: Generate something creative and interesting, use Markdown, be a concise tech expert but kind to non-technical readers.
+
+input_folder: input
+output_folder: output
+```
+
 ## Additional Make Commands
 
 - `freeze`: Saves the installed Python package versions to the `requirements.txt` file.

transcribe_me/main.py

@@ -188,12 +188,10 @@ def install_config():
 
     if not OPENAI_API_KEY:
         openai_key = input("Enter your OpenAI API key: ")
-        config["openai"]["api_key"] = openai_key
         append_to_shell_profile(f"export OPENAI_API_KEY={openai_key}")
 
     if not ANTHROPIC_API_KEY:
         anthropic_key = input("Enter your Anthropic API key: ")
-        config["anthropic"]["api_key"] = anthropic_key
         append_to_shell_profile(f"export ANTHROPIC_API_KEY={anthropic_key}")
 
     with open(".transcribe.yaml", "w") as f: