docs: Update README to explain how to run this using Tutor (#1472)

.env

@@ -4,6 +4,7 @@
 NODE_ENV='production'
 
 ACCESS_TOKEN_COOKIE_NAME=''
+APP_ID='learning'
 BASE_URL=''
 CONTACT_URL=''
 CREDENTIALS_BASE_URL=''

.env.development

@@ -4,6 +4,7 @@
 NODE_ENV='development'
 
 ACCESS_TOKEN_COOKIE_NAME='edx-jwt-cookie-header-payload'
+APP_ID='learning'
 BASE_URL='http://localhost:2000'
 CONTACT_URL='http://localhost:18000/contact'
 CREDENTIALS_BASE_URL='http://localhost:18150'

.env.test

@@ -4,6 +4,7 @@
 NODE_ENV='test'
 
 ACCESS_TOKEN_COOKIE_NAME='edx-jwt-cookie-header-payload'
+APP_ID='learning'
 BASE_URL='http://localhost:2000'
 CONTACT_URL='http://localhost:18000/contact'
 CREDENTIALS_BASE_URL='http://localhost:18150'

README.rst

@@ -21,50 +21,82 @@ Getting Started
 Prerequisites
 =============
 
-The `devstack`_ is currently recommended as a development environment for your
-new MFE.  If you start it with ``make dev.up.lms`` that should give you
-everything you need as a companion to this frontend.
-
-Note that it is also possible to use `Tutor`_ to develop an MFE.  You can refer
-to the `relevant tutor-mfe documentation`_ to get started using it.
-
-.. _Devstack: https://github.com/openedx/devstack
+`Tutor`_ is currently recommended as a development environment for the Learning
+MFE. Most likely, it already has this MFE configured; however, you'll need to
+make some changes in order to run it in development mode. You can refer
+to the `relevant tutor-mfe documentation`_ for details, or follow the quick
+guide below.
 
 .. _Tutor: https://github.com/overhangio/tutor
 
 .. _relevant tutor-mfe documentation: https://github.com/overhangio/tutor-mfe#mfe-development
 
-To use this application, `devstack <https://github.com/openedx/devstack>`__ must be running and you must be logged into it.
-
-- Visit http://localhost:2000/course/course-v1:edX+DemoX+Demo_Course to view the demo course.  You can replace ``course-v1:edX+DemoX+Demo_Course`` with a different course key.
 
-Cloning and Startup
-===================
+Cloning and Setup
+=================
 
 1. Clone your new repo:
 
 .. code-block:: bash
 
     git clone https://github.com/openedx/frontend-app-learning.git
 
-2. Use node v18.x.
+2. Use node v20.x.
 
   The current version of the micro-frontend build scripts supports node 18.
   Using other major versions of node *may* work, but this is unsupported.  For
   convenience, this repository includes an ``.nvmrc`` file to help in setting the
   correct node version via `nvm <https://github.com/nvm-sh/nvm>`_.
 
-3. Install npm dependencies:
+3. Stop the Tutor devstack, if it's running: ``tutor dev stop``
+
+4. Next, we need to tell Tutor that we're going to be running this repo in
+   development mode, and it should be excluded from the ``mfe`` container that
+   otherwise runs every MFE. Run this:
+
+.. code-block:: bash
+
+    tutor mounts add /path/to/frontend-app-learning
+
+5. Start Tutor in development mode. This command will start the LMS and Studio,
+   and other required MFEs like ``authn`` and ``account``, but will not start
+   the learning MFE, which we're going to run on the host instead of in a
+   container managed by Tutor. Run:
+
+.. code-block:: bash
+
+    tutor dev start lms cms mfe
+
+Startup
+=======
+
+1. Install npm dependencies:
 
 .. code-block:: bash
 
   cd frontend-app-learning && npm ci
 
-4. Start the dev server:
+2. Start the dev server:
+
+.. code-block:: bash
+
+  npm run dev
+
+Then you can access the app at http://local.openedx.io:2000/learning/
+
+Troubleshooting
+---------------
+
+If you see an "Invalid Host header" error, then you're probably using a different domain name for your devstack such as
+``local.edly.io`` or ``local.overhang.io`` (not the new recommended default, ``local.openedx.io``). In that case, run
+these commands to update your devstack's domain names:
 
 .. code-block:: bash
 
-  npm start
+  tutor dev stop
+  tutor config save --set LMS_HOST=local.openedx.io --set CMS_HOST=studio.local.openedx.io
+  tutor dev launch -I --skip-build
+  tutor dev stop learning  # We will run this MFE on the host
 
 Local module development
 =========================

package.json

@@ -19,6 +19,7 @@
     "postinstall": "patch-package",
     "snapshot": "fedx-scripts jest --updateSnapshot",
     "start": "fedx-scripts webpack-dev-server --progress",
+    "dev": "PUBLIC_PATH=/learning/ MFE_CONFIG_API_URL='http://localhost:8000/api/mfe_config/v1' fedx-scripts webpack-dev-server --progress --host apps.local.openedx.io",
     "test": "fedx-scripts jest --coverage --passWithNoTests"
   },
   "author": "edX",