Uncompress the nodejs archive

Ensure that we uncompress the downloaded archive

Signed-off-by: Aidan Delaney <[email protected]>

content/docs/buildpack-author-guide/create-buildpack/build-app.md

@@ -39,7 +39,7 @@ Next, we'll download the NodeJS runtime and install it into the layer directory.
 ```bash
 echo "---> Downloading and extracting NodeJS"
 node_js_url=https://nodejs.org/dist/v18.18.1/node-v18.18.1-linux-x64.tar.xz
-wget -q -O - "${node_js_url}" | tar -xf - -C "${node_js_layer}"
+wget -q -O - "${node_js_url}" | tar -xzf - -C "${node_js_layer}"
 ```
 
 This code uses the `wget` tool to download the NodeJS binaries from the given URL, and extracts it to the `node_js_layer` directory.
@@ -74,7 +74,7 @@ mkdir -p "${node_js_layer}"
 # 3. DOWNLOAD node-js
 echo "---> Downloading and extracting NodeJS"
 node_js_url=https://nodejs.org/dist/v18.18.1/node-v18.18.1-linux-x64.tar.xz
-wget -q -O - "${node_js_url}" | tar -xf - -C "${node_js_layer}"
+wget -q -O - "${node_js_url}" | tar -xzf - -C "${node_js_layer}"
 
 # 4. MAKE node-js AVAILABLE DURING LAUNCH
 echo -e '[types]\nlaunch = true' > "${layersdir}/node-js.toml"