update the install guide to include pip install statsmodel bathyreq c…

…dsapi

docs/install-guide.md

@@ -10,11 +10,30 @@ Clone the github repo
 git clone --depth 1 https://github.com/Doodleverse/SDStools.git
 ```
 
-Then, to use:
+## Install Additional Dependencies
+
+SDS tools differs from CoastSeg in that it uses 3 additional dependencies
+
+- `statsmodel`: Provides statistical models and filters, such as the Hampel Filter.
+- `bathyreq `: Allows downloading topobathy data using [BathyReq](https://github.com/NeptuneProjects/BathyReq)
+- `cdsapi`: Enables downloading ERA5 wave data from the [CDSAPI](https://pypi.org/project/cdsapi/)
+
+```
+conda activate coastseg
+cd <location SDS_tools installed>
+pip install statsmodel bathyreq cdsapi
+```
+
+### How to Use the Scripts
+
+After installing the dependencies, activate the CoastSeg environment, navigate to the scripts directory within SDS_tools, and run the desired script.
 
 ```
 conda activate coastseg
 cd <location SDS_tools installed>
 cd scripts
 python <script_name.py>
+
 ```
+
+Replace <script_name.py> with the name of the script you want to run.