use jq for vscode extention rewrite

hosts/artemis/default.nix

@@ -7,15 +7,18 @@
   ];
   environment.systemPackages = with pkgs; [
     (pkgs.vscodium.overrideAttrs (oldAttrs: {
+      nativeBuildInputs = (oldAttrs.nativeBuildInputs or []) ++ [ pkgs.jq ];
       postInstall = (oldAttrs.postInstall or "") + ''
-        substituteInPlace $out/Applications/VSCodium.app/Contents/Resources/app/product.json \
-          --replace '"extensionsGallery": {}' '"extensionsGallery": {
-            "serviceUrl": "https://visualstudio.com",
-            "cacheUrl": "https://windows.net",
-            "itemUrl": "https://visualstudio.com",
-            "controlUrl": "https://msecnd.net",
-            "recommendationsUrl": "https://visualstudio.com/recommendations"
-          }'
+        productJson=$out/Applications/VSCodium.app/Contents/Resources/app/product.json
+        tmp=$(mktemp)
+        jq '.extensionsGallery = {
+          serviceUrl: "https://marketplace.visualstudio.com/_apis/public/gallery",
+          cacheUrl: "https://vscode.blob.core.windows.net/gallery/index",
+          itemUrl: "https://marketplace.visualstudio.com/items",
+          controlUrl: "",
+          recommendationsUrl: ""
+        }' "$productJson" > "$tmp"
+        mv "$tmp" "$productJson"
       '';
     }))
     git