Update Dockerfile

Author: critesjosh

.devcontainer/Dockerfile

@@ -14,4 +14,6 @@ RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.5/install.sh | b
     && nvm alias default ${NODE_VERSION}
 
 # Add node and npm to path
-ENV PATH="${NVM_DIR}/versions/node/v${NODE_VERSION}/bin:${PATH}"
+ENV PATH="${NVM_DIR}/versions/node/v${NODE_VERSION}/bin:${PATH}"
+RUN npm i -g yarn
+RUN yarn