fix devcontainer by installing sha3sum

Author: lovasoa

.devcontainer/Dockerfile

@@ -68,4 +68,9 @@ RUN echo ". /emsdk/emsdk_env.sh" >> /etc/bash.bashrc
 RUN echo 'export EM_NODE_JS="$EMSDK_NODE"' >> /etc/bash.bashrc
 
 # END EMSDK
-# --------------------------------------------------------------------
+# --------------------------------------------------------------------
+
+# Install wget, gnupg, and sha3sum
+RUN apt-get update \
+    && apt-get install -y wget gnupg libdigest-sha3-perl \
+    && rm -rf /var/lib/apt/lists/*