Dockerfile (#1)

* Initial work for adding a Dockerfile and creating an image for inspector

Fixes #237

* Updating workflow to publish to GitHub Container Registry

Using guide from https://docs.github.com/en/actions/use-cases-and-examples/publishing-packages/publishing-docker-images

Dockerfile

@@ -0,0 +1,26 @@
+FROM node:22-slim
+
+# Set working directory
+WORKDIR /app
+
+# Copy files
+COPY . .
+
+# Install dependencies
+# Working around https://github.com/npm/cli/issues/4828
+# RUN npm ci
+RUN npm install --no-package-lock
+
+# Build the application
+RUN npm run build
+
+ENV CLIENT_PORT=6274
+ENV SERVER_PORT=6277
+
+# Expose the CLIENT_PORT and SERVER_PORT
+EXPOSE $CLIENT_PORT
+EXPOSE $SERVER_PORT
+
+# Use ENTRYPOINT with CMD for arguments
+ENTRYPOINT ["npm", "start"]
+CMD []