doc_: update use-status-backend-server.md

doc/use-status-backend-server.md

@@ -29,7 +29,24 @@ For the Android simulator, you need to reverse the port:
 ```shell
 adb reverse tcp:60000 tcp:60000
 ```
+However, there is restriction when use adb reverse, we use random port for media server. So I'd suggest use "10.0.2.2:60000" as `STATUS_BACKEND_SERVER_HOST`.
 
-### Known issues
-- Android devices may not display images due to TLS certificate validation issues with the image server
-- exportUnencryptedDatabaseV2/import-multiaccount does not work for android, probably cause of tech debt, I found it during creating the draft PR.
+### Debug status-go using IDEA
+Assume you've already set up the development environment for status-go, open status-go project use IDEA, run `make generate` with terminal in the status-go project root directory to ensure all the generated files are up to date, then open `cmd/status-backend/main.go` file, navigate to function `main()`, click the green play button on the left of `main()`, choose `Modify Run Configuration`, in `Program arguments` section, add `--address=localhost:60000 --media-https=false`, then click `OK`, finally click the green play button on the left of `main()` again and choose `Debug ...`.
+Basically, you don't have to run `make generate` again and again, just run it once at the beginning. So you can re-run and debug it faster!
+
+## Known Android simulator issues
+- Issue#1: Android simulator may not display images due to TLS certificate validation issues with the image server
+  - solution: use http instead of https for media server with command: `MEDIA_HTTPS=false PORT=60000 make run-status-backend`, currently status-go does not support http for media server. You have to use this draft [PR](https://github.com/status-im/status-go/pull/6060), you also need to update `(def ^:const image-server-uri-prefix "http://10.0.2.2:")` manually in `image_server.cljs`, and to make `/accountInitials` work, you need to copy `Inter-Medium.ttf` to your host machine from the android simulator, let's say you store it in `/Users/mac/Downloads/Inter-Medium.ttf`, then you need to update `get-font-file-ready` manually in `image_server.cljs` to return the correct path so that status backend server can access it.
+- Issue#2: exportUnencryptedDatabaseV2/import-multiaccount does not work for android, probably cause of tech debt, I found it during creating the draft PR.
+- Issue#3: unable to invoke `multiaccounts_storeIdentityImage` to change avatar image.
+  - The reason is that we path the absolute path of the image to the backend server, but the image file is stored in the android simulator. the backend server cannot access it as it runs in the host machine.
+
+If you're using ios simulator, you can skip above issues!
+
+## Details for issue#3 if you're interested
+- we use `react-native-fast-image` which use okhttpclient behind
+- we were using custom cert for https
+- we fetch the custom cert through endpoint `ImageServerTLSCert`
+- we fetched it through built-in status-go before, now we need to fetch it through status backend server
+- we expect `OkHttpClientProvider.setOkHttpClientFactory(StatusOkHttpClientFactory())` to be invoked early(will trigger fetching wrong custom cert via built-in status-go since StatusBackendClient is not initialised yet!) in `MainApplication.kt` before executing clojure code, otherwise we will get black screen after `make run-android` . After deep research, I found there's no way to update the cert okhttpclient used to the correct one return from status backend server