change local port from 1313 to make my life easier

[skip ci]

Dockerfile

@@ -1,7 +1,9 @@
 # Usage:
-#     docker build -t jarv.is:develop -f Dockerfile .
-#     docker run -v $(pwd):/src -p 1313:1313 jarv.is:develop
-# ...then open http://localhost:1313 for the live-refresh server.
+#     docker build -t jarv.is -f Dockerfile .
+#     docker run -v $(pwd):/src -p 1337:1337 jarv.is
+# ...then open http://localhost:1337 for the live-refresh server.
+#
+# Based on: https://github.com/jakejarvis/hugo-build-action/blob/master/Dockerfile
 
 FROM alpine:latest
 
@@ -12,7 +14,11 @@ ENV HUGO_EXTENDED 1
 # only install libc6-compat & libstdc++ if we're building extended Hugo
 # https://gitlab.com/yaegashi/hugo/commit/22f0d5cbd6114210ba7835468facbdee60609aa2
 RUN apk update && \
-    apk add --no-cache ca-certificates git nodejs ${HUGO_EXTENDED:+libc6-compat libstdc++} && \
+    apk add --no-cache \
+      ca-certificates \
+      git \
+      nodejs \
+      ${HUGO_EXTENDED:+libc6-compat libstdc++} && \
     update-ca-certificates && \
     wget https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_${HUGO_EXTENDED:+extended_}${HUGO_VERSION}_Linux-64bit.tar.gz && \
     wget https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_${HUGO_VERSION}_checksums.txt && \
@@ -23,14 +29,14 @@ RUN apk update && \
     rm -rf hugo_*
 
 # verify everything's OK
-RUN /usr/bin/hugo version
+RUN hugo version
 
 # add site source as volume
 VOLUME /src
 WORKDIR /src
 
-# expose live-refresh server
-EXPOSE 1313
+# expose live-refresh server (on custom port)
+EXPOSE 1337
 
-ENTRYPOINT ["/usr/bin/hugo"]
-CMD ["server", "--buildDrafts", "--buildFuture", "--bind", "0.0.0.0", "--port", "1313", "--verbose"]
+ENTRYPOINT ["hugo"]
+CMD ["server", "--buildDrafts", "--buildFuture", "--port", "1337", "--bind", "0.0.0.0", "--verbose"]