ibmse: update development doc for debug_assertions

Signed-off-by: Qi Feng Huo <[email protected]>

attestation-service/verifier/src/se/README.md

@@ -44,7 +44,7 @@ openssl pkey -in kbs.key -pubout -out kbs.pem
 
 ## Build KBS
 ```
-cargo install --locked --path kbs/src/kbs --no-default-features --features coco-as-builtin,openssl,resource,opa 
+cargo install --locked --debug --path kbs/src/kbs --no-default-features --features coco-as-builtin,openssl,resource,opa 
 ```
 
 ## (Option 1) Launch KBS as a program
@@ -108,6 +108,8 @@ export SE_SKIP_CERTS_VERIFICATION=true
 DOCKER_BUILDKIT=1 docker build -t ghcr.io/confidential-containers/staged-images/kbs:latest --build-arg KBS_FEATURES=coco-as-builtin,openssl,resource,opa . -f kbs/docker/Dockerfile
 ```
 
+> Note: Please add `--debug` in statement like `cargo install xxx` in file `kbs/docker/Dockerfile` if you're using a development host key document to skip HKD's signature verification.
+
 - Prepare a docker compose file, similar as:
 ```
 services: