Prepare project for public release

.dockerignore

@@ -0,0 +1,26 @@
+# Never let credentials into an image layer. config.ini holds the SNMP auth
+# and priv passphrases; supply them at runtime via env instead.
+config.ini
+.env
+
+# Local runtime artefacts.
+.git/
+.github/
+.agents/
+.codex/
+.venv/
+venv/
+tests/
+state.json
+state.json.tmp
+__pycache__/
+*.pyc
+.coverage
+htmlcov/
+
+# Host-specific deployment files, irrelevant inside the container.
+wlc-monitor.service
+wlc-monitor.timer
+README.md
+CONTRIBUTING.md
+SECURITY.md