Ensure devcontainer uses the platform of the toolchain (#1073)

* Refactor devcontainer into Docker Compose

We need to make the platform explicit (only via the Docker Compose) as the Dockerfile fetches a crosscompiler for x86.

* Add git to dev container

.devcontainer/Dockerfile

@@ -1,6 +1,6 @@
 FROM ubuntu:22.04
 RUN apt-get update && apt-get upgrade -y && \
-    apt-get install -y make wget xz-utils && \
+    apt-get install -y git make wget xz-utils && \
     wget -qO- "https://developer.arm.com/-/media/Files/downloads/gnu-a/10.2-2020.11/binrel/gcc-arm-10.2-2020.11-x86_64-arm-none-linux-gnueabihf.tar.xz?revision=d0b90559-3960-4e4b-9297-7ddbc3e52783&rev=d0b9055939604e4b92977ddbc3e52783&hash=0074C1529DE90C98726B80ED3EE0776C" | tar -xJ && \
     mv gcc-arm-* /usr/local/bin && \
     printf 'export PATH=$PATH:%s\n' /usr/local/bin/gcc-arm-*/bin >> ~/.bashrc && \

.devcontainer/devcontainer.json

@@ -1,5 +1,5 @@
 {
-  "build": {
-    "dockerfile": "Dockerfile"
-  }
-}
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "devcontainer",
+  "workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}"
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,10 @@
+version: "3.8"
+services:
+  devcontainer:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    platform: linux/amd64
+    volumes:
+      - ../..:/workspaces:cached
+    command: sleep infinity