Fix: Add hadolint ignore comment for Dockerfile line 6

Signed-off-by: Ihor Dvoretskyi <ihor@linux.com>

Author: idvoretskyi

.devcontainer/Dockerfile

@@ -1,6 +1,7 @@
 FROM mcr.microsoft.com/devcontainers/base:ubuntu-24.04
 
 # Install essential packages
+# hadolint ignore=DL3008
 RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
     && apt-get -y install --no-install-recommends \
         curl \