Add dockerfile

.dockerignore

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+.git
+.gitignore
+Dockerfile
+.dockerignore
+README.md
+LICENSE
+node_modules/
+coverge/
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local

Dockerfile

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+FROM node:23-alpine3.21
+RUN apk upgrade --update-cache --available
+
+LABEL version=0.0.1 description="BadgeDex"
+
+# Create a group and user && Create directory for files
+RUN mkdir /app && addgroup -S badgedex && adduser -h /app -S badgedex -g "Badgedex User" -G badgedex &&  chown -R badgedex:badgedex /app && chmod -R 755 /app
+
+#Switch to working directory
+WORKDIR /app
+
+# Tell docker that all future commands should run as the appuser user
+USER badgedex
+
+# Bundle app source. Create .dockerignore not copy all files from source directory
+COPY --chown=badgedex:badgedex . .
+
+#Install dependencies
+RUN npm install
+
+# Expose API port
+EXPOSE 3000
+#Start node application
+ENTRYPOINT ["npm"]
+
+CMD [ "start" ]