Add documentation about available Docker images for Extender and how to use it.

docs/en/en.json

@@ -1677,6 +1677,10 @@
                     {
                         "path": "/manuals/extender-local-setup",
                         "name": "Setup local build server"
+                    },
+                    {
+                        "path": "/manuals/extender-docker-iamges",
+                        "name": "Avaialble Docker images to run Extender"
                     }
                 ]
             }

docs/en/manuals/extender-docker-images.md

@@ -0,0 +1,46 @@
+---
+title: Available Docker images
+brief: Document described available Docker images and Defold versions that used it
+---
+
+# Avaialble Docker images
+Below is a list of all avaialble Docker images in public Registry. That images can be used to run Extender in environment with old SDK that isn't supported yet.
+
+|SDK|Image tag|Platform name (in Extender's config)|Defold version that used image|
+|---|---------|------------------------------------|------------------------------|
+|Linux latest|europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-linux-env:latest|linux-latest|All Defold versions|
+|Android NDK25|europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-android-ndk25-env:latest|android-ndk25|Since 1.4.3|
+|Emscripten 2.0.11|europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-emsdk-2011-env:latest|emsdk-2011|Until 1.7.0|
+|Emscripten 3.1.55|europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-emsdk-3155-env:latest|emsdk-3155|[1.8.0-1.9.3]|
+|Emscripten 3.1.65|europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-emsdk-3165-env:latest|emsdk-3165|Since 1.9.4|
+|Winsdk 2019|europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-winsdk-2019-env:latest|winsdk-2019|Until 1.6.1|
+|Winsdk 2022|europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-winsdk-2022-env:latest|winsdk-2022|Since 1.6.2|
+
+# How to use old Docker images
+To use old environment you should go through following steps:
+1. Modify `docker-compose.yml` from Extender's repository [link](https://github.com/defold/extender/blob/dev/server/docker/docker-compose.yml). Need to add one more definition of service with necessary Docker image. For example, if we want to use Docker image that contains Emscripten 2.0.11 we need to add following service definition:
+    ```yml
+    emscripten_2011-dev:
+        image: europe-west1-docker.pkg.dev/extender-426409/extender-public-registry/extender-emsdk-2011-env:latest
+        extends:
+        file: common-services.yml
+        service: remote_builder
+        profiles:
+        - all
+        - web
+        networks:
+        default:
+            aliases:
+            - emsdk-2011
+    ```
+    Important fields are:
+    * **profiles** - list of profiles that triggers service start. Profile names passed via `--profile <profile_name>` argument to `docker compose` command.
+    * **networks** - list of networks that shoud used by Docker container. For running Extender used network with name `default`. Important to set service network aliases (it will be used in later Extender's configuration).
+2. Add definition of remote builder in [application-local-dev-app.yml](https://github.com/defold/extender/blob/dev/server/configs/application-local-dev-app.yml) in `extender.remote-builder.platforms` section. In our example it will looks like:
+    ```yml
+        emsdk-2011:
+            url: http://emsdk-2011:9000
+            instanceId: emsdk-2011
+    ```
+    Url should be in following format: `http://<service_network_alias>:9000`, where `service_network_alias` - network alias from step 1. 9000 - standard port for Extender (can be different if you are using custom Extender configuration).
+3. Run local Extender as it described in [How to run local Extender with preconfigured artifacts](/manuals/extender-local-setup#how-to-run-local-extender-with-preconfigured-artifacts).