Update Dockerfile

Dockerfile

@@ -37,16 +37,16 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     software-properties-common && \
     rm -rf /var/lib/apt/lists/*
     
-RUN curl -sL https://deb.nodesource.com/setup_18.x | sudo -E bash - && \
+RUN curl -sL https://deb.nodesource.com/setup_20.x | sudo -E bash - && \
     apt install nodejs && \
-    npm install -g yarn
+    # npm install -g yarn
 
 WORKDIR $HOME
 
 RUN git clone https://github.com/Lissy93/dashy.git && \
     cd dashy && \
-    yarn && \
-    yarn build
+    npm install && \
+    npm run build
 
 WORKDIR $HOME/dashy
 
@@ -54,4 +54,4 @@ USER $USER
 
 EXPOSE $PORT
 
-CMD ["yarn", "start"]
+CMD ["npm", "run", "start"]