Use default nodejs in docker image (#421)

* Use default nodejs in docker image

Dockerfile

@@ -26,14 +26,8 @@ RUN mkdir /opt/fake_rust/ && \
 
 # Step 2: Do the necessary setups
 FROM webr as scratch
-# Install node 18
-RUN mkdir -p /etc/apt/keyrings && \
-    curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | \
-    gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg && \
-    echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] \
-    https://deb.nodesource.com/node_18.x nodistro main" | \
-    tee /etc/apt/sources.list.d/nodesource.list && \
-    apt-get update && \
+# Install nodejs
+RUN apt-get update && \
     apt-get install nodejs -y
 
 # Install Rust; these lines are based on the official Rust docker image: