Merge branch 'containerization' into 'main'

Legg til Docker-konfigurasjon

See merge request !24

.dockerignore

+.vscode/
+cypress/
+node_modules/
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Dockerfile

+FROM node:lts AS frontend-builder
+WORKDIR /build
+COPY . /build
+RUN npm install
+RUN npm run build
+
+FROM node:lts AS frontend-runner
+COPY --from=frontend-builder /build/dist .
+EXPOSE 8888
+ENTRYPOINT ["npx", "-y", "http-server-spa", ".", "index.html", "8888"]
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