fix(docker): add curl to apt dependencies

curl is a ubiquitous tool both for users running ad-hoc commands inside
the container (debugging, health checks, quick HTTP probes) and for
agent workflows — many bundled skills and hub skills lean on curl for
HTTP calls, API exploration, and installer bootstrapping. Its absence
causes silent workflow failures with "curl: command not found" until
the user manually apt-installs it.

Add curl to the single apt-get install layer alongside the other base
utilities (build-essential, nodejs, git, openssh-client, etc.) so it
ships in the image with zero extra layers and negligible size impact
(~400 KB).

- Dockerfile: add curl to the apt-get install list

Dockerfile

@@ -14,7 +14,7 @@ ENV PLAYWRIGHT_BROWSERS_PATH=/opt/hermes/.playwright
 # that would otherwise accumulate when hermes runs as PID 1. See #15012.
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
-    build-essential nodejs npm python3 ripgrep ffmpeg gcc python3-dev libffi-dev procps git openssh-client docker-cli tini && \
+    build-essential curl nodejs npm python3 ripgrep ffmpeg gcc python3-dev libffi-dev procps git openssh-client docker-cli tini && \
     rm -rf /var/lib/apt/lists/*
 
 # Non-root user for runtime; UID can be overridden via HERMES_UID at runtime
@@ -70,4 +70,4 @@ ENV HERMES_WEB_DIST=/opt/hermes/hermes_cli/web_dist
 ENV HERMES_HOME=/opt/data
 ENV PATH="/opt/data/.local/bin:${PATH}"
 VOLUME [ "/opt/data" ]
-ENTRYPOINT [ "/usr/bin/tini", "-g", "--", "/opt/hermes/docker/entrypoint.sh" ]
+ENTRYPOINT [ "/usr/bin/tini", "-g", "--", "/opt/hermes/docker/entrypoint.sh" ]