chore: update .gitignore (#97)

Author: maximiliantech

.gitignore

@@ -29,9 +29,12 @@ Dockerfile.cross
 
 # exclude secret
 examples/sample_secret.yaml
-examples/dynatrace_secret.yaml
 examples/secret.yaml
-/examples/datasink/dynatrace-prod-setup.yaml
 
 # debug file
 *debug*
+
+# charts
+charts/*/charts/*.tgz
+
+tmp/