chore: update devcontainer.json for git completion install at container creation

Author: lukeocodes

.devcontainer/devcontainer.json

@@ -2,16 +2,8 @@
   "name": "Node.js & TypeScript",
   "image": "mcr.microsoft.com/devcontainers/typescript-node:1-20-bullseye",
   "features": {
-    "ghcr.io/devcontainers-contrib/features/typescript:2": {}
+    "ghcr.io/devcontainers-contrib/features/bash-command:1": {},
+    "ghcr.io/guiyomh/features/vim:0": {}
   },
-  "customizations": {
-    "vscode": {
-      "extensions": [
-        "blipn.terminal-icon",
-        "eamodio.gitlens",
-        "redhat.vscode-xml",
-        "redhat.vscode-yaml"
-      ]
-    }
-  }
+  "postCreateCommand": "wget --no-check-certificate --content-disposition https://raw.githubusercontent.com/git/git/master/contrib/completion/git-completion.bash -O ~/git-completion.bash; echo \". ~/git-completion.bash\" >> ~/.bashrc"
 }