Renamed a bunch of images to use fnproject org. (#239)

* Renamed a bunch of images to use fnproject org.

* Multi-stage build for Docker.

* Added tmp vendor dirs to gitignore.

* Run docker-build at beginning of test.

Dockerfile

@@ -1,7 +1,13 @@
-FROM funcy/dind
+# build stage
+FROM golang:alpine AS build-env
+RUN apk --no-cache add build-base git bzr mercurial gcc
+ENV D=/go/src/github.com/fnproject/fn
+# TODO: once we get rid of the vendor dirs, add dep step using `dep ensure --vendor-only` from here: https://medium.com/travis-on-docker/triple-stage-docker-builds-with-go-and-angular-1b7d2006cb88
+ADD . $D
+RUN cd $D && go build -o fn-alpine && cp fn-alpine /tmp/
 
+# final stage
+FROM fnproject/dind
 WORKDIR /app
-
-ADD functions-alpine /app/functions
-
+COPY --from=build-env /tmp/fn-alpine /app/functions
 CMD ["./functions"]