fix(cowrie): add missing COPY+chmod for entrypoint.sh in Dockerfile

The entrypoint.sh was present in the build context but never COPYed into
the image, causing 'stat /entrypoint.sh: no such file or directory' at
container start. Added COPY+chmod before the USER decnet instruction so
the script is installed as root and is executable by all users.

templates/cowrie/Dockerfile

@@ -12,6 +12,9 @@ RUN useradd -r -s /bin/false -d /opt decnet \
  && rm -rf /var/lib/apt/lists/* \
  && (find /usr/bin/ -maxdepth 1 -name 'python3*' -type f -exec setcap 'cap_net_bind_service+eip' {} \; 2>/dev/null || true)
 
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
 HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
   CMD kill -0 1 || exit 1