Allow to build uchiwa packages in docker

It's really helpful to have an ability to build uchiwa package
in docker image, without installing additional dependencies on
host system

build/Dockerfile

@@ -0,0 +1,22 @@
+FROM golang:1.8.1-alpine
+
+ENV GOARCH=amd64
+
+# Disable cgo so that binaries we build will be fully static.
+ENV CGO_ENABLED=0
+
+RUN apk add --no-cache \
+  bash \
+  build-base \
+  git \
+  libffi-dev \
+  make \
+  nodejs \
+  rpm \
+  ruby-dev \
+  ruby-rake \
+  tar && \
+  gem install rake -v "10.5.0" --no-ri --no-rdoc && \
+  gem install fpm -v "1.8.1" --no-ri --no-rdoc && \
+  rm -rf /usr/lib/ruby/gems/*/cache/* && \
+  rm -rf ~/.gem

build/tests.sh

@@ -6,11 +6,13 @@ echo "" > coverage.txt
 
 for d in $(go list ./... | grep -v vendor); do
   race=""
-  if [ $GOARCH == "amd64" ]; then
+  # The race detector is broken on Alpine. That is #14481 (and #9918).
+  # So disable it for now.
+  if [ "${GOARCH}" = "amd64" ] && [ ! -f /etc/alpine-release ]; then
     race="-race"
   fi
 
-  go test $race -coverprofile=profile.out -covermode=atomic $d
+  go test $race -coverprofile=profile.out -covermode=atomic "$d"
   if [ -f profile.out ]; then
     cat profile.out >> coverage.txt
     rm profile.out