Add stuff from .gitignore to .dockerignore, including config.py

Author: matyasselmeci

Diff for: .dockerignore

@@ -4,3 +4,17 @@ projects
 rpm
 topology
 virtual-organizations
+
+# copied from .gitignore
+pip-selfcheck.json
+__pycache__
+*-auth.xml
+src/*.pyc
+src/webapp/*.pyc
+src/config.py
+*/.DS_Store
+.vscode
+
+docker/secrets
+docker/config.py
+docker/config-webhook.py