Fix production build

Dockerfile

@@ -0,0 +1,22 @@
+FROM alpine:3.11 AS build
+
+COPY . /src
+WORKDIR /src
+
+RUN apk add --no-cache nodejs npm git
+RUN npm install && npm run build
+
+FROM alpine:3.11
+
+COPY --from=build /src/build /app
+
+WORKDIR /app
+
+RUN apk add --no-cache caddy
+
+COPY misc/dokku/Caddyfile /app/Caddyfile
+COPY misc/dokku/CHECKS /app/CHECKS
+
+EXPOSE 80
+
+CMD ["caddy"]