fix: add start-hermes.sh baked into image, replace broken ENTRYPOINT

- New start-hermes.sh: multi-profile launcher that works with s6-overlay's
  main-program model (replaces bash->tini->entrypoint.sh chain)
- Dockerfile: COPY start-hermes.sh into /usr/local/bin/ alongside
  run-multi-gateways.sh (which is now unused but kept for reference)
- compose.yml: remove entrypoint override, CMD now points at
  /usr/local/bin/start-hermes.sh via the image default ENTRYPOINT

Fixes the SIGTERM crash loop caused by S6_CMD_ARG0 being unset when the
deprecated entrypoint.sh shim bypassed s6-overlay's /init.

ai/compose.yml

@@ -11,7 +11,7 @@ services:
     # for proper s6-overlay supervision. The CMD runs our multi-profile launcher
     # which spawns per-profile gateways in background, then the default gateway
     # in foreground (keeps the container alive).
-    command: ["/opt/data/start-hermes.sh"]
+    command: ["/usr/local/bin/start-hermes.sh"]
     environment:
       - HERMES_UID=10000
       - HERMES_GID=10000

ai/hermes/Dockerfile

@@ -62,6 +62,11 @@ PYEOF
 # Launches one gateway process per profile (HERMES_PROFILES env var)
 COPY --chmod=0755 run-multi-gateways.sh /usr/local/bin/run-multi-gateways.sh
 
+# ---------- Install s6-overlay compatible startup script ----------
+# Runs as the CMD via s6-overlay's main-program model.
+# Replaces the old bash->tini->entrypoint.sh chain that caused SIGTERM crash loops.
+COPY --chmod=0755 start-hermes.sh /usr/local/bin/start-hermes.sh
+
 # ---------- Runtime ----------
 USER hermes
 ENV HERMES_HOME=/opt/data

ai/hermes/start-hermes.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+# Multi-profile + default gateway launcher — runs as the CMD via s6-overlay.
+#
+# The image's default ENTRYPOINT ["/init", "/opt/hermes/docker/main-wrapper.sh"]
+# starts the s6 supervision tree, then exec's main-wrapper.sh with the CMD args.
+# main-wrapper.sh sources the venv, drops to the hermes user via s6-setuidgid,
+# and exec's this script.
+#
+# This script:
+#   1. Launches per-profile background gateways (HERMES_PROFILES env var)
+#   2. Starts the default gateway in foreground (keeps the container alive)
+#
+# Replaces the old approach of chaining bash -> tini -g -> deprecated entrypoint.sh
+# which bypassed s6-overlay and caused the SIGTERM crash loop.
+
+set -e
+
+HERMES_BIN="/opt/hermes/.venv/bin/hermes"
+
+# --- Multi-profile gateways (background) ---
+if [ -n "${HERMES_PROFILES:-}" ]; then
+    echo "[start-hermes] Launching per-profile gateways: ${HERMES_PROFILES}"
+    IFS=',' read -ra PROFILES <<< "${HERMES_PROFILES}"
+    for profile in "${PROFILES[@]}"; do
+        profile="$(echo "${profile}" | xargs)"  # trim whitespace
+        [ -z "${profile}" ] && continue
+        echo "[start-hermes]  -> background gateway for profile '${profile}'"
+        # No gosu/s6-setuidgid needed — we're already running as the hermes user
+        # (main-wrapper.sh drops privileges before exec'ing this script).
+        nohup "${HERMES_BIN}" --profile "${profile}" gateway run \
+            >> "/opt/data/logs/gateway-${profile}.log" 2>&1 &
+    done
+    echo "[start-hermes] All profile gateways launched"
+fi
+
+# --- Default gateway (foreground — keeps container alive) ---
+echo "[start-hermes] Starting default gateway (foreground)"
+exec "${HERMES_BIN}" gateway run