Align ATVM coverage and notes with template command

atvm/watcher-service/start-atvm-run-watcher.sh

@@ -9,6 +9,7 @@ Usage:
 Options:
   --build-name <name>
   --template <name>
+  --template-command <text>
   --config-family <name>
   --config-file <path>
   --migration-style <text>
@@ -22,6 +23,7 @@ EOF
 
 BUILD_NAME=""
 TEMPLATE=""
+TEMPLATE_COMMAND=""
 CONFIG_FAMILY=""
 CONFIG_FILE=""
 MIGRATION_STYLE=""
@@ -35,6 +37,7 @@ while [[ $# -gt 0 ]]; do
   case "$1" in
     --build-name) BUILD_NAME="${2:-}"; shift 2 ;;
     --template) TEMPLATE="${2:-}"; shift 2 ;;
+    --template-command) TEMPLATE_COMMAND="${2:-}"; shift 2 ;;
     --config-family) CONFIG_FAMILY="${2:-}"; shift 2 ;;
     --config-file) CONFIG_FILE="${2:-}"; shift 2 ;;
     --migration-style) MIGRATION_STYLE="${2:-}"; shift 2 ;;
@@ -70,6 +73,7 @@ PY
 
 cat >"${RUN_DIR}/watch.env" <<EOF
 ATVM_WATCHER_TEMPLATE=${TEMPLATE@Q}
+ATVM_WATCHER_TEMPLATE_COMMAND=${TEMPLATE_COMMAND@Q}
 ATVM_WATCHER_CONFIG_FAMILY=${CONFIG_FAMILY@Q}
 ATVM_WATCHER_CONFIG_FILE=${CONFIG_FILE@Q}
 ATVM_WATCHER_MIGRATION_STYLE=${MIGRATION_STYLE@Q}