Guide for Ollama local LLM (#615)

* doc: Guide for using local LLM with Ollama

opendevin/llm/LOCAL_LLM_GUIDE.md

@@ -0,0 +1,73 @@
+# Local LLM Guide with Ollama and Litellm
+
+- This is a guide to use local LLM's with Ollama and Litellm
+
+## 1. Follow the default installation:
+```
+git clone git@github.com:OpenDevin/OpenDevin.git
+```
+or 
+```
+git clone git@github.com:<YOUR-USERNAME>/OpenDevin.git
+```
+
+then `cd OpenDevin`
+
+## 2. Run setup commands:
+```
+make build
+make setup-config
+```
+
+## 3. Modify config file:
+
+- after running `make setup-config` you will see a generated file called `config.toml` in `OpenDevin/`.
+
+- open this file and modify it to your needs based on this template:
+
+```
+LLM_API_KEY="0"
+LLM_MODEL="ollama/<model_name>"
+LLM_BASE_URL="http://localhost:<port_number>"
+WORKSPACE_DIR="./workspace"
+```
+`<port_number>` can be whatever you want just make sure it is not used by anything else.
+
+ollama model names can be found [here](https://ollama.com/library) 
+
+Example:
+![alt text](images/ollama.png)
+
+Note: The API key does not matter and the base url needs to be `localhost` with the port number you intend to use with litellm. By default this is `11434`.
+
+## 4. Run Litellm in CLI:
+
+- there are two options for this:
+
+#### 1. Run litellm in linux terminal:
+```
+conda activate <env_name>
+litellm --model ollama/<model_name>
+```
+
+#### 2. Create a batch script:
+- The below example assumes the use of miniconda3 with default install settings, you will need to change this to the path to your `conda.sh` file if you use something else.
+```
+start /B wsl.exe -d <DISTRO_NAME> -e bash -c "source ~/miniconda3/etc/profile.d/conda.sh && conda activate <ENV_NAME> && litellm --model ollama/<MODEL_NAME> --port <PORT>"
+```
+- The above script will spawn a wsl instance in your cmd terminal, activate your conda environment and then run the litellm command with your model and port number.
+- make sure you fill in all the <> brackets with the appropriate names.
+
+Either way you do it you should see something like this to confirm you have started the server:
+![alt text](images/example.png)
+
+## 5. Start OpenDevin:
+
+At this point everything should be set up and working properly. 
+1. Start by running the litellm server using one of the methods outlined above
+2. Run `make build` in your terminal `~/OpenDevin/`
+3. Run `make run` in your terminal 
+4. If that fails try running the server and front end in sepparate terminals:
+ - In the first terminal `make start-backend`
+ - In the second terminal `make start-frontend`
+5. you should now be able to connect to `http://localhost:3001/` with your local model running!