Added docker support

frontend/Dockerfile

@@ -0,0 +1,22 @@
+FROM node:18 AS frontend-build
+
+WORKDIR /app/frontend
+
+COPY ./package.json ./package-lock.json ./
+RUN npm install
+
+COPY ./ ./
+RUN npm run build
+
+FROM nginx:stable AS runtime
+
+WORKDIR /usr/share/nginx/html
+
+COPY --from=frontend-build /app/frontend/dist .
+COPY ./envVars.sh /docker-entrypoint.d/
+
+RUN chmod +x /docker-entrypoint.d/envVars.sh
+
+ENV BACKEND=
+
+EXPOSE 80