readme: updated

README.md

@@ -2,17 +2,42 @@
 
 A [SIEVE cache](https://cachemon.github.io/SIEVE-website/) implementation for C++. Based on [D implementation](https://github.com/kubo39/sieve-cache-d).
 
-### How to use
+### How to Use
+
+* Test on [godbolt](https://godbolt.org/z/fej9cM61j)
+
+**or**
+
+* Add in your `CMakeLists.txt`
+
+```cmake
+include(FetchContent)
+FetchContent_Declare(
+    sieve
+    GIT_REPOSITORY "https://github.com/kassane/sieve-cache-cpp.git"
+    GIT_TAG main
+)
+set(BUILD_BENCH OFF)
+set(BUILD_TESTS OFF)
+FetchContent_GetProperties(sieve)
+if(NOT sieve_POPULATED)
+    FetchContent_Populate(sieve)
+endif()
+set(SIEVE_PATH "${sieve_SOURCE_DIR}/include")
+
+add_executable(${PROJECT_NAME} "demo.cc")
+target_include_directories(${PROJECT_NAME} PRIVATE ${SIEVE_PATH})
+```
 
 ```bash
 $ cmake -B build
 $ cmake --build build
-# Run benchmark sample
+# Run benchmark sample (if enabled)
 $ cmake --build build --target bench
-# Run unittest
+# Run unittest  (if enabled)
 $ cmake --build build --target unittest
 ```
 
 ## LICENSE
 
-See: [LICENSE](LICENSE)
+See: [LICENSE](LICENSE)