Rewrite bootstrapper in Python

- This was going to get too complex for bash. Only way to
  kill those scripts is before they get too complex.
- Better progress messages from bootstrapper.
- Differentiate between bootstrapper & installer
- Cleanup documentation a little bit

docs/contributing/dev-setup.rst

@@ -34,13 +34,13 @@ The easiest & safest way to develop & test TLJH is with `Docker <https://www.doc
 
       sudo docker exec -it tljh-dev /bin/bash
 
-#. Run the installer from inside the container (see step above): 
-   The container image is already set up to default to a ``dev`` install, so 
+#. Run the bootstrapper from inside the container (see step above):
+   The container image is already set up to default to a ``dev`` install, so
    it'll install from your local repo rather than from github.
 
    .. code-block:: console
 
-      bash /srv/src/installer/install.bash
+      python3 /srv/src/bootstrap/bootstrap.py
 
    The primary hub environment will also be in your PATH already for convenience.
 
@@ -51,8 +51,8 @@ The easiest & safest way to develop & test TLJH is with `Docker <https://www.doc
 #. Make some changes to the repository. You can test easily depending on what
    you changed.
 
-   * If you changed the ``installer/install.bash`` script or any of its dependencies,
-     you can test it by running ``bash /srv/src/installer/install.bash``.
+   * If you changed the ``bootstrap/bootstrap.py`` script or any of its dependencies,
+     you can test it by running ``python3 /srv/src/bootstrap/bootstrap.py``.
 
    * If you changed the ``tljh/installer.py`` code (or any of its dependencies),
      you can test it by running ``python3 -m tljh.installer``.

docs/guides/install.rst

@@ -10,7 +10,7 @@ The quick way to install The Littlest JupyterHub (tljh) is:
 
 .. code-block:: bash
 
-   curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/installer/install.bash | sudo bash -
+   curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/bootstrap/bootstrap.py | sudo python3 -
 
 This takes 2-5 minutes to run. When completed, you can access your new JupyterHub
 at the public IP of your server!
@@ -21,7 +21,7 @@ after installation.
 Slightly less quick installation
 --------------------------------
 
-If you can read ``bash`` and are nervous about the previous installation method,
+If you can read ``python3`` and are nervous about the previous installation method,
 you can inspect the installer script before running it.
 
 
@@ -29,7 +29,7 @@ you can inspect the installer script before running it.
 
    .. code-block:: bash
 
-      curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/installer/install.bash  -o install.bash
+      curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/bootstrap/bootstrap.py -o bootstrap.py
 
 2. Read the install script source using your favorite text editor
 
@@ -37,6 +37,6 @@ you can inspect the installer script before running it.
 
    .. code-block:: bash
 
-      sudo install.bash
+      sudo python3 bootstrap.py
 
    This should have the exact same effects as the quick installer method.

docs/index.rst

@@ -11,10 +11,10 @@ On a fresh Ubuntu 18.04 server, you can install The Littlest JupyterHub with:
 
 .. code-block:: bash
 
-   curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/installer/install.bash | sudo bash -
+   curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/bootstrap/bootstrap.py | sudo python3 -
 
 This takes 2-5 minutes to run. When completed, you can access your new JupyterHub
-at the public IP of your server!
+at the public IP of your server! Read the :ref:`tutorial_quickstart` next.
 
 If this installation method (``curl <arbitrary-url> | sudo bash -``)
 makes you nervous, check out the :ref:`other installation methods <installation>` we support!

docs/tutorials/quickstart.rst

@@ -25,7 +25,7 @@ Step 1: Install the Littlest JupyterHub (TLJH)
 
 .. code-block:: bash
 
-   curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/installer/install.bash | sudo bash -
+   curl https://raw.githubusercontent.com/yuvipanda/the-littlest-jupyterhub/master/bootstrap/bootstrap.py | sudo python3 -
 
 This takes about 1-3 minutes to finish. When completed, you can visit the
 public IP of your server to use your JupyterHub! You can log in with any username