Add the waka-box Dockerfile

Dockerfile

@@ -0,0 +1,21 @@
+FROM node:lts-alpine
+
+# Labels for GitHub to read your action
+LABEL "com.github.actions.name"="waka-box"
+LABEL "com.github.actions.description"="Update a pinned gist to contain WakaTime stats"
+# Here are all of the available icons: https://feathericons.com/
+LABEL "com.github.actions.icon"="clipboard"
+# And all of the available colors: https://developer.github.com/actions/creating-github-actions/creating-a-docker-container/#label
+LABEL "com.github.actions.color"="blue"
+
+# Copy the package.json and package-lock.json
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci
+
+# Copy the rest of your action's code
+COPY . .
+
+# Run `node index.js`
+ENTRYPOINT ["node", "index.js"]