Add documentation for data migration

docs/index.rst

@@ -14,6 +14,7 @@ InvenTree Source Documentation
    Tables<tables>
    REST API<rest>
    Backup and Restore<backup>
+   Migrate Data<migrate>
    InvenTree Modules <modules>
    Module Reference<reference>
 

docs/migrate.rst

@@ -0,0 +1,33 @@
+Migrating Data
+==============
+
+.. toctree::
+   :titlesonly:
+   :maxdepth: 2
+   :caption: Migrating Data
+   :hidden:
+
+In the case that data needs to be migrated from one database installation to another, the following procedure can be used to export data, initialize the new database, and re-import the data.
+
+Export Data
+-----------
+
+``python3 manage.py dumpdata --exclude contenttypes --exclude auth.permission --indent 2 > data.json``
+
+This will export all data (including user information) to a json data file.
+
+Initialize Database
+-------------------
+
+Configure the new database using the normal processes (see `Getting Started <start.html>`_):
+
+``python3 manage.py makemigrations``
+
+``python3 manage.py migrate --run-syncdb``
+
+Import Data
+-----------
+
+The new database should now be correctly initialized with the correct table structures requried to import the data.
+
+``python3 manage.py loaddata data.json``