Update readme, ad a todo list

README.md

@@ -19,3 +19,25 @@ Run `bin/doctor` for debug output
   - base config file for docker-compose, not meant to be edited
 - `config/local.yml`
   - local overrides, and environment configuration, editable
+
+
+## Data directories
+
+- `data/mongo`
+- `data/redis`
+- `data/sharelatex`
+
+All are persisted outside of the containers. 
+
+
+## TODO
+
+- [ ] Improve the init script
+- [ ] Figure out if we can have a separate `image.txt` file
+- [ ] Cleaner config, especially in `local.yml`
+  - [ ] Re-assess naming of config files
+- [ ] Consistent `--help` output from each tool
+- [ ] Full documentation
+   - [ ] New user walkthrough
+   - [ ] Documentation for each file
+   - [ ] Documentation for each tool in the bin folder