updated documentation

Dockerfile

@@ -1,11 +1,31 @@
+# use the classic alpine image
 FROM alpine as Builder
-RUN apk update && apk add curl git
+
+# install curl and git
+RUN apk add curl git
+
+# download and unnzip the hugo binary then place it in /usr/local/bin
 RUN curl -L https://github.com/gohugoio/hugo/releases/download/v0.92.2/hugo_0.92.2_Linux-ARM64.tar.gz > hugo.tar.gz && tar -zxf hugo.tar.gz && mv hugo /usr/local/bin
+
+# clone the blog repository as well as the theme submodule
 RUN git clone --recurse-submodules https://gitlab.com/AHMZA/blog.git
+
+# set blog (the folder we just cloned) as the current DIR
 WORKDIR blog
+
+# Hugo generates the static files and minifies them
 RUN hugo --minify
 
+
+
+# Nginx image is as basic as we can get
 FROM nginx
+
+# copy the nginx.conf file
 COPY --from=Builder /blog/nginx.conf /etc/nginx/nginx.conf
+
+# copy the static files
 COPY --from=Builder /blog/public/ /usr/share/nginx/html
+
+# Tell the image to expose port 80 for HTTP
 EXPOSE 80