Update README.md

README.md

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 ## Introduction
 
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+
 PETAce-SetOps is a collection of protocols that perform private set operations.
 It is one of the many components in [the framework PETAce](https://github.com/tiktok-privacy-innovation/PETAce).
 
 Private set operations generally include private set intersection (PSI), private join and compute (PJC), and private information retrieval (PIR) protocols.
 Currently, PETAce-SetOps implements the ECDH-PSI protocol based on Elliptic-Curve Diffie-Hellman, the [KKRT-PSI](https://dl.acm.org/doi/abs/10.1145/2976749.2978381) protocol based on Oblivious Pseudorandom Functions (OPRF), and the PJC protocol based on [Circuit-PSI](https://www.researchgate.net/publication/356421123_Circuit-PSI_With_Linear_Complexity_via_Relaxed_Batch_OPPRF).
 
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 ## Requirements
 
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 | System | Toolchain                                             |
 |--------|-------------------------------------------------------|
 | Linux  | Clang++ (>= 5.0) or GNU G++ (>= 5.5), CMake (>= 3.15) |
@@ -71,6 +77,8 @@ To run as Party B (a receiver):
 bash build/example/scripts/ecdh_psi_receiver_example.sh
 ```
 
+<!-- end-petace-setops-getting-started -->
+
 ## Contribution
 
 Please check [Contributing](CONTRIBUTING.md) for more details.