adjust build include path and set install build type to release

.github/workflows/install.yml

@@ -15,7 +15,7 @@ jobs:
     
     - name: build and install library
       run: |
-        cmake -H. -Bbuild
+        cmake -H. -Bbuild -DCMAKE_BUILD_TYPE=Release
         sudo cmake --build build --target install
         rm -rf build
 

CMakeLists.txt

@@ -52,7 +52,7 @@ set_target_properties(Greeter PROPERTIES CXX_STANDARD 17)
 target_include_directories(Greeter
   PUBLIC 
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-    $<INSTALL_INTERFACE:include>
+    $<INSTALL_INTERFACE:include/${PROJECT_NAME}-${PROJECT_VERSION}>
 )
 
 # ---- Create an installable target ----