Update Docker files to get hugo from packages.

Dockerfile.dev

@@ -1,11 +1,13 @@
-FROM golang:alpine
+FROM alpine:latest
 
 # This should be mounted with docker run command
 WORKDIR /src
+RUN cd /src
 
-# Build and run hugo
-ENV GO111MODULE=on
-RUN go get -u github.com/gohugoio/hugo@v0.69.0
+# 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=0.69.1-r0
 
 # Run the development server
-ENTRYPOINT cd /src && hugo server --bind 0.0.0.0
+ENTRYPOINT hugo server --bind 0.0.0.0

Dockerfile.prod

@@ -1,5 +1,5 @@
 # STEP 1: Build the website's files
-FROM golang:alpine AS build-website
+FROM alpine:latest AS build-website
 
 WORKDIR /src
 
@@ -7,8 +7,10 @@ COPY . /src/
 
 RUN cd /src
 
-ENV GO111MODULE=on
-RUN go get -u github.com/gohugoio/hugo@v0.69.0
+# 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=0.69.1-r0
 
 RUN hugo --minify