adapt Dockerfile for apple silicon & fix typo in tasks

.devcontainer/Dockerfile

 # See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.234.0/containers/cpp/.devcontainer/base.Dockerfile
 
-FROM alpine:latest
+FROM --platform=linux/amd64 alpine:latest
 
-RUN apk add bash g++ gdb make qemu qemu-img qemu-system-x86_64 qemu-system-i386 qemu-ui-curses && \
+RUN apk add bash git g++ gdb make qemu qemu-img qemu-system-x86_64 qemu-system-i386 qemu-ui-curses && \
     adduser -D -s /bin/bash vscode && \
     touch /home/vscode/.bashrc && \
     chown vscode:vscode /home/vscode/.bashrc
\ No newline at end of file

.vscode/tasks.json

@@ -116,11 +116,11 @@
             },
             "linux": {
                 "comments": "To quit Alt + 2 > quit",
-                "command": "cd build/boot; qemu-system-x86_64 -curses -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
+                "command": "cd build/boot; qemu-system-x86_64 -display curses -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
             },
             "osx": {
                 "comments": "To quit Alt + 2 > quit",
-                "command": "cd build/boot; qemu-system-x86_64 -curses -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
+                "command": "cd build/boot; qemu-system-x86_64 -display curses -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
             },
             "group": {
                 "kind": "build",
@@ -141,11 +141,11 @@
             },
             "linux": {
                 "comments": "To quit Alt + 2 > quit",
-                "command": "cd build/boot; qemu-system-i386 -curses  -S -s -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
+                "command": "cd build/boot; qemu-system-i386 -display curses -S -s -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
             },
             "osx": {
                 "comments": "To quit Alt + 2 > quit",
-                "command": "cd build/boot; qemu-system-i386 -curses -S -s -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
+                "command": "cd build/boot; qemu-system-i386 -display curses -S -s -net nic,model=ne2k_isa -net user,tftp=./ -cdrom grub.iso"
             },
             "group": {
                 "kind": "build",