Docker fix (#8835)

* Fix server command in Dockerfile

* Ensure invoke is installed into the venv

* Run extra check in docker build step

* Improve documentation

* Intercept ModuleNotFoundError

- Clear error message

* Docs updates

* Add extra check to dev docker build

* Cleanup tasks.py

* Prevent double activation of venv

* Change order of operations

---------

Co-authored-by: Matthias Mair <code@mjmair.com>

docs/docs/develop/contributing.md

@@ -34,7 +34,9 @@ A "bare metal" development setup can be installed as follows:
 ```bash
 git clone https://github.com/inventree/InvenTree.git && cd InvenTree
 python3 -m venv env && source env/bin/activate
-pip install django invoke && invoke
+pip install --upgrade --ignore-installed invoke
+invoke install
+invoke update
 invoke dev.setup-dev --tests
 ```
 

docs/docs/develop/devcontainer.md

@@ -111,7 +111,7 @@ Make sure you have `gnupg` and `pinentry-mac` installed and set up correctly. Re
 
 #### Where are the database, media files, ... stored?
 
-Backups, Commandhistory, media/static files, venv, plugin.txt, secret_key.txt, ... are stored in the `dev` folder. If you want to start with a clean setup, you can remove that folder, but be aware that this will delete everything you already setup in InvenTree.
+Backups, media/static files, venv, plugin.txt, secret_key.txt, ... are stored in the `dev` folder. If you want to start with a clean setup, you can remove that folder, but be aware that this will delete everything you already setup in InvenTree.
 
 ### Performance Improvements