add Dockerfile to serve build with static web server

Modifications to original commit:

* Add usage comment to Dockerfile

Signed-off-by: Vanya A. Sergeev <[email protected]>

contrib/Dockerfile

@@ -0,0 +1,24 @@
+# syntax=docker/dockerfile:1
+
+# From repo root directory:
+# $ docker build -t briefsky -f contrib/Dockerfile .
+# $ docker run -p 80:80 briefsky
+
+FROM node:22-alpine as build
+# Ensure git is installed for baking version number
+RUN apk add --no-cache git
+RUN mkdir /app
+WORKDIR /app
+# Copy app into build container and build release
+COPY . .
+RUN npm install && npm run build
+
+FROM joseluisq/static-web-server:2-alpine
+# Add curl for health check
+RUN apk add --no-cache curl
+# Copy built app into static webserver container
+COPY --from=build /app/dist /public
+# Enable /health endpoint
+ENV SERVER_HEALTH=true
+# Set start period for quicker start check intervals of 5s
+HEALTHCHECK --start-period=30s --start-interval=5s CMD curl --fail http://localhost/health || exit 1