fix: use Dockerfile to resolve Codespaces registry resolution bug

Author: mios-dev

.devcontainer/Dockerfile

@@ -0,0 +1,13 @@
+FROM fedora:rawhide
+
+# Install MiOS Toolchain
+RUN dnf install -y     just     fastfetch     btop     podman     buildah     skopeo     jq     yq     rsync     git     nodejs     npm     sudo     zsh     findutils     grep     sed     gawk     && dnf clean all
+
+# Install Gemini CLI
+RUN npm install -g @google/gemini-cli
+
+# Setup vscode user for Codespaces parity
+RUN useradd -m -s /usr/bin/zsh vscode &&     echo "vscode ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/vscode
+
+USER vscode
+WORKDIR /workspaces/MiOS

.devcontainer/devcontainer.json

@@ -1,16 +1,18 @@
 {
-  "name": "Fedora MiOS Dev",
-  "image": "registry.fedoraproject.org/fedora:rawhide",
+  "name": "Fedora MiOS Dev (Rawhide)",
+  "build": {
+    "dockerfile": "Dockerfile",
+    "context": ".."
+  },
   "features": {
     "ghcr.io/devcontainers/features/common-utils:2": {
       "configureZshAsDefaultShell": true
     },
-    "ghcr.io/devcontainers/features/node:1": {
-      "version": "lts"
-    },
-    "ghcr.io/devcontainers/features/podman:1": {}
+    "ghcr.io/devcontainers/features/docker-in-docker:1": {
+      "version": "latest",
+      "moby": true
+    }
   },
-  "postCreateCommand": "sudo dnf install -y just fastfetch btop jq yq rsync bash-completion tar gzip xz python3 findutils grep sed gawk && npm install -g @google/gemini-cli",
   "customizations": {
     "vscode": {
       "settings": {