Revert "fix(docker): use envsubst template pattern — no hardcoded URLs or keys (MS22-P1a)"

This reverts commit 11136e2f23.

docker/openclaw-instances/entrypoint.sh

@@ -1,23 +0,0 @@
-#!/bin/sh
-# OpenClaw container entrypoint — renders config template via envsubst then starts gateway
-set -e
-
-TEMPLATE="/config/openclaw.json.template"
-CONFIG="/tmp/openclaw.json"
-
-if [ ! -f "$TEMPLATE" ]; then
-  echo "ERROR: Config template not found at $TEMPLATE"
-  exit 1
-fi
-
-# Validate required env vars
-: "${ZAI_API_KEY:?ZAI_API_KEY is required}"
-: "${OPENCLAW_GATEWAY_TOKEN:?OPENCLAW_GATEWAY_TOKEN is required}"
-: "${OLLAMA_BASE_URL:?OLLAMA_BASE_URL is required (e.g. http://10.1.1.42:11434)}"
-
-# Render template -> final config (no hardcoded values in image or volumes)
-envsubst < "$TEMPLATE" > "$CONFIG"
-
-export OPENCLAW_CONFIG_PATH="$CONFIG"
-
-exec openclaw gateway run --bind lan --auth token "$@"