fix: some compose variables would incorrectly be shown as empty

These variable are valued after the displaying code.

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/compose

@@ -954,6 +954,7 @@ load_env() {
     if [ -z "$COMPOSE_LAUNCHER_OPTS" ]; then
         mk_docker_run_options "$@" || return 1
     else
+        set_os || return 1
         while read-0 opt; do
             if [[ "$opt" == "!env:"* ]]; then
                 opt="${opt##!env:}"
@@ -986,9 +987,7 @@ run() {
     local os docker_run_opts
     load_env "$@" || return 1
 
-    [ -n "$DEBUG" ] && show_env
-
-    set_os || return 1
+    [ -n "$DEBUG" ] && show_env >&2
 
     if [ -n "$ARG_COMPOSE_FILE" ]; then
         array_read-0 cmd_args < \
@@ -1041,8 +1040,8 @@ depends docker cat readlink sed realpath tee sed grep tail
 ansi_color "${ansi_color:-tty}"
 
 if [ "$SHOW_ENV" ]; then
-    load_env || return 1
-    show_env
+    load_env "$@" || return 1
+    show_env >&2
     exit 0
 fi