Update Dockerfile to use newly placed static web server.

Dockerfile

@@ -0,0 +1,23 @@
+# STEP 1: Build the website's files
+FROM alpine:latest AS build-website
+
+WORKDIR /src
+
+COPY . /src/
+
+# Get hugo -- using the edge branch to get latest version
+RUN sed -i -e 's/v[[:digit:]]\..*\//edge\//g' /etc/apk/repositories
+RUN apk update && apk upgrade && \
+    apk add --no-cache hugo
+
+RUN hugo --minify
+
+# STEP 2: Add static files to webserver image
+FROM registry.digitalocean.com/ssdocker/simplesystems/static-web-server:latest
+
+WORKDIR /app
+
+# Copy over static website files
+COPY --from=build-website /src/public /app/public
+
+ENTRYPOINT ["./static-web-server", "-rootDir", "public", "-port", "80"]