feat: print otterwiki, nginx and supervisord versions

This closes #188.

docker/entrypoint.sh

@@ -76,4 +76,11 @@ for PLUGIN in /app-data/plugins/*/ /plugins/*/; do
     pip install -U . || echo "Error: Installation of plugin in $PLUGIN failed." >&2
 done
 
+# print nginx version
+nginx -v
+# run nginx config test
+nginx -t
+echo -n "supervisord version "
+supervisord -v
+
 exec "$@"

otterwiki/server.py

@@ -2,6 +2,7 @@
 # vim: set et ts=8 sts=4 sw=4 ai:
 
 import os
+import sys
 import logging
 import datetime
 from flask import Flask
@@ -58,6 +59,12 @@
 )
 app.config.from_envvar("OTTERWIKI_SETTINGS", silent=True)
 
+# print current version
+print(
+    f"*** Starting An Otter Wiki {__version__} {os.getenv('GIT_TAG', '')}",
+    file=sys.stderr,
+)
+
 # check if any config option exists as environment variable
 for key in app.config:
     if key in os.environ: