Update docs for inventree-dev-server

- Now uses PostgreSQL, not sqlite

docs/start/docker_dev.md

@@ -13,6 +13,9 @@ There are some key differences compared to the [docker production setup](./docke
 - The django webserver is used, instead of running behind Gunicorn
 - The server will automatically reload when code changes are detected
 
+!!! info "Static and Media Files"
+    The development server runs in DEBUG mode, and serves static and media files natively.
+
 The [InvenTree docker image](https://github.com/inventree/InvenTree/blob/master/docker/Dockerfile) uses a [multi-stage build](https://docs.docker.com/develop/develop-images/multistage-build/) process to allow both production and development setups from the same image. The key difference is that the production image is pre-built using InvenTree source code from GitHub, while the development image uses the source code from your local machine (allowing live code updates).
 
 ### Docker Compose
@@ -23,12 +26,27 @@ This script specifies the following containers:
 
 | Container | Description |
 | --- | --- |
+| inventree-dev-db | Database image (PostgreSQL) |
 | inventree-dev-server | Web server using the django development server |
 | inventree-dev-worker | Background task manager |
 
 !!! success "Works out of the box"
     You should not need to make any changes to the `docker-compose.dev.yml` file to run the development docker container
 
+#### PostgreSQL Database
+
+A PostgreSQL database container requires a username:password combination (which can be changed). This uses the official [PostgreSQL image](https://hub.docker.com/_/postgres).
+
+*__Note__: An empty database must be manually created as part of the setup (below)*.
+
+#### Web Server
+
+Runs an InvenTree web server instance, powered by Django's built-in webserver.
+
+#### Background Worker
+
+Runs the InvenTree background worker process.
+
 ### Environment Variables
 
 Environment variables for the docker containers can be found in the file `dev-config.env` in the `docker` directory.
@@ -57,20 +75,45 @@ docker-compose -f docker-compose.dev.yml build
 
 ### Create Database
 
-!!! info "First Run Only"
+If this is the first time you are interacting with the docker containers, the InvenTree database has not yet been created.
+
+!!! success "First Run Only"
     This command only needs to be executed on the first run, if the development database has not already been initialized
 
+Run the following command to open a shell session for the database
+
+```
+docker-compose -f docker-compose.dev.yml run inventree-dev-server pgcli -h inventree-db -p 5432 -u pguser
+```
+
+!!! info "User"
+    If you have changed the `POSTGRES_USER` variable in the compose file, replace `pguser` with the different username.
+
+You will be prompted to enter the database user password (default="pgpassword", unless altered in the compose file).
+
+Once logged in, run the following command in the database shell:
+
+```
+create database inventree;
+```
+
+Then exit the shell with <kbd>Ctrl</kbd>+<kbd>d</kbd>
+
+### Database Setup
+
+The database has now been created, but it is empty! Perform the initial database setup by running the following command:
+
 ```
 docker-compose -f docker-compose.dev.yml run inventree-dev-server invoke update
 ```
 
-This command performs the following tasks:
+This command performs the following steps:
 
-- Install required python packages into a local python virtual environment
+- Ensure required python packages are installed
-- Create an SQLite database and perform schema migrations
+- Perform the required schema updates to create the required database tables
-- Collect static files
+- Update translation files
 
-### Create Superuser
+### Create Admin Account
 
 !!! info "First Run Only"
     This command only needs to be executed on the first run, if you have not already created a superuser account for the database

docs/start/docker_prod.md

@@ -33,7 +33,7 @@ The example docker-compose file launches the following containers:
 
 #### PostgreSQL Database
 
-A postgresql database container which creates a postgres user:password combination (which can be changed). This uses the official [PostgreSQL image](https://hub.docker.com/_/postgres).
+A PostgreSQL database container which requires a username:password combination (which can be changed). This uses the official [PostgreSQL image](https://hub.docker.com/_/postgres).
 
 *__Note__: An empty database must be manually created as part of the setup (below)*.
 
@@ -116,7 +116,7 @@ This starts the database container (in this example, a PostgreSQL server).
 
 ### Create Database
 
-If this is the first time we are interacting with the docker containers, the InvenTree database has not yet been created.
+If this is the first time you are interacting with the docker containers, the InvenTree database has not yet been created.
 
 !!! success "First Run Only"
     If you have already created the InvenTree database you can progress to the next step