GITBOOK-318: change request with no subject merged in GitBook

for-developers/dev-env-setup.md

@@ -31,8 +31,9 @@ docker compose run core init-dev-env
 docker compose up
 ```
 
-To use different versions of Defguard images, edit _docker-compose.yaml_ file, replacing `image:` sections.
-Consult [Defguard Package](https://github.com/DefGuard/defguard/pkgs/container/defguard) versions to browse for available image tags.
+### Switching images
+
+To use different versions of Defguard images, edit _docker-compose.yaml_ file, replacing `image:` sections. Consult [Defguard Package](https://github.com/DefGuard/defguard/pkgs/container/defguard) versions to browse for available image tags.
 
 For example, to use current development version, change this section in _docker-compose.yaml_:
 
@@ -41,6 +42,20 @@ core:
   image: ghcr.io/defguard/defguard:dev
 ```
 
+### Running local code
+
+To run local code you will need to build core image from local changes:
+
+```bash
+docker compose build core
+```
+
+Then just run the compose normally.
+
+```bash
+docker compose up
+```
+
 ## Cargo
 
 To run Defguard Core without Docker, you'll need:
@@ -79,8 +94,6 @@ popd
 
 You'll find environment variables in _.env_ file. Source them however you like (we recommend [direnv](https://direnv.net/)).
 
-
-
 Once that's done, you can run backend with:
 
 ```
@@ -91,7 +104,6 @@ cargo run
 
 **http://localhost:8000/**
 
-
 ### Minimum required settings
 
 Consult [Configuration](../features/setting-up-your-instance/configuration.md) manual for a list of all available configuration settings.