Update SETUP.md for instruction to install e-diagnosis, ht, and rcd

docs/SETUP.md

@@ -87,6 +87,8 @@ tests/test.py ...........                                                  [100%
 
 ### Install RCAEval in RCD mode
 
+The RCD mode is used to run RCD, HT, and E-Diagnosis methods.
+
 **Create and activate a virtual environment**
 
 ```bash
@@ -108,6 +110,15 @@ pip install -e .[rcd]
 bash script/link.sh
 ```
 
+**Install PyRCA for HT and E-Diagnosis**
+
+```
+# for ht
+sudo apt install openjdk-11-jre-headless
+git clone https://github.com/salesforce/PyRCA.git
+cd PyRCA; pip install -e .; cd ..
+```
+
 **Reproduce RCD**
 
 Users can reproduce the RCA performance of the RCD method using the following command:
@@ -131,4 +142,4 @@ Avg@5-LOSS:  0.51
 ---
 Avg speed: 16.2
 ```
-</details>
+</details>