add hints re requirements.txt to installation instructions

README.md

@@ -35,6 +35,7 @@ Do not use this technology if you are not aware of the costs and consequences.
 There is a detailed [tutorial](https://github.com/haesleinhuepf/git-bob/blob/main/docs/installation-tutorial.md) on how to install git-bob as GitHub action to your repository. In very short, to use git-bob in your GitHub repository, you need to 
 * Copy the [git-bob](https://github.com/haesleinhuepf/git-bob/blob/main/.github/workflows/git-bob.yml) GitHub workflow in folder `.github/workflows/` to your repository.
   * Make sure to replace `pip install -e .` with a specific git-bob version such as `pip install git-bob==0.16.0`.
+  * If your project does not contain a `requirements.txt` file, remove the line `pip install -r requirements.txt`.
   * Configure the LLM you want to use in the workflow files by specifying the `GIT_BOB_LLM_NAME` environment variable. These were tested:
     * `claude-3-5-sonnet-20241022`
     * `gpt-4o-2024-08-06`

docs/installation-tutorial-gitlab.md

@@ -12,6 +12,7 @@ For demonstration purposes, a [playground repository on gitlab.com](https://gitl
   In this file, make the following modifications:
   * If you are working with an own gitlab instance, modify the variable `GIT_SERVER_URL`. Enter the url of your server and finish with "/".
   * In the line `- pip install git-bob==0.16.0` consider updating the version number.
+  * If your project does not contain a `requirements.txt` file, remove the line `pip install -r requirements.txt`.
 * Add a requirements.txt (or remove the line `- pip install -r requirements.txt`) from the yml file.
 
 ## Setting access tokens

docs/installation-tutorial.md

@@ -18,6 +18,8 @@ by this one:
 pip install git-bob==0.16.0
 ```
 
+If your project does not contain a `requirements.txt` file, remove the line `pip install -r requirements.txt`.
+
 ## Step 2: Creating an OpenAI API Key
 
 We navigate to the [openai API website](https://openai.com/index/openai-api/) and log in.