adding example and template_file as optional in config

TODO.todo

@@ -24,7 +24,8 @@ Documentation:
 Functionality:
     ✔ Move any `tembo.CONFIG` calls out of `pages.py` and ensure these are passed in from the cli. @done(21-10-28 19:44)
     ✔ Make `config scope` a dict in `cli.py`. @done(21-10-28 19:44)
-    ☐ Add the `--example` output to the miscounted token message so the user knows the correct command to use.
+    ✔ Make example optional @done(21-10-29 00:15)
+    ✔ Add the `--example` output to the miscounted token message so the user knows the correct command to use. @done(21-10-29 00:15)
     ✔ Page options dataclass @done(21-10-28 20:09)
     ☐ Replace loggers with `click.echo` for command outputs. Keep logging messages for actual logging messages?
     ☐ Use the python runner Duty
@@ -39,6 +40,9 @@ VSCode:
         ☐ Document build error: <https://github.com/pyenv/pyenv/issues/1095>
         PYTHON_CONFIGURE_OPTS="--enable-framework" pyenv install 3.8.11
         ☐ Freeze a click app: <https://stackoverflow.com/questions/45090083/freeze-a-program-created-with-pythons-click-pacage>
+        ☐ If python 3.9 can be used with Pyinstaller, rewrite the code to use the latest Python features
+            dict.update -> |=
+            walrus :=
 
 Tests:
     ☐ Write tests! @2d