esp-idf/examples/system/ota/advanced_https_ota/main/CMakeLists.txt

idf_component_register(SRCS "advanced_https_ota_example.c" 
                    INCLUDE_DIRS "."
                    # Embed the server root certificate into the final binary
                    EMBED_TXTFILES ${project_dir}/server_certs/ca_cert.pem)