fix: cargo install use cargo.lock

- --locked makes use of cargo.lock
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

vlsd/Dockerfile

@@ -17,8 +17,8 @@ RUN git clone https://gitlab.com/lightning-signer/validating-lightning-signer.gi
 RUN cd vls && \
     echo building $VLS_GIT_HASH \
     git checkout $VLS_GIT_HASH && \
-    cargo install --path ./vls-proxy --bin vlsd2 --profile release --root /usr/local/ && \
-    cargo install --path ./vls-cli --profile release --root /usr/local/ && \
+    cargo install --locked --path ./vls-proxy --bin vlsd2 --profile release --root /usr/local/ && \
+    cargo install --locked --path ./vls-cli --profile release --root /usr/local/ && \
     cargo clean
 
 FROM --platform=${TARGETPLATFORM:-${BUILDPLATFORM:-linux/amd64}} alpine:3.18 as runner