Add docker things for documentation

CONTRIBUTING.md

@@ -147,6 +147,25 @@ ok      _/home/user/go/src/github/containous/traefik    0.004s
 
 The [documentation site](http://docs.traefik.io/) is built with [mkdocs](http://mkdocs.org/)
 
+### Method 1: `Docker` and `make`
+
+You can test documentation using the `docs` target.
+
+```bash
+$ make docs
+docker build -t traefik-docs -f docs.Dockerfile .
+# […]
+docker run  --rm -v /home/user/go/github/containous/traefik:/mkdocs -p 8000:8000 traefik-docs mkdocs serve
+# […]
+[I 170828 20:47:48 server:283] Serving on http://0.0.0.0:8000
+[I 170828 20:47:48 handlers:60] Start watching changes
+[I 170828 20:47:48 handlers:62] Start detecting changes
+```
+
+And go to [http://127.0.0.1:8000](http://127.0.0.1:8000).
+
+### Method 2: `mkdocs`
+
 First make sure you have python and pip installed
 
 ```shell

Makefile

@@ -21,11 +21,15 @@ TRAEFIK_DEV_IMAGE := traefik-dev$(if $(GIT_BRANCH),:$(subst /,-,$(GIT_BRANCH)))
 REPONAME := $(shell echo $(REPO) | tr '[:upper:]' '[:lower:]')
 TRAEFIK_IMAGE := $(if $(REPONAME),$(REPONAME),"containous/traefik")
 INTEGRATION_OPTS := $(if $(MAKE_DOCKER_HOST),-e "DOCKER_HOST=$(MAKE_DOCKER_HOST)", -v "/var/run/docker.sock:/var/run/docker.sock")
+TRAEFIK_DOC_IMAGE := traefik-docs
 
 DOCKER_BUILD_ARGS := $(if $(DOCKER_VERSION), "--build-arg=DOCKER_VERSION=$(DOCKER_VERSION)",)
 DOCKER_RUN_OPTS := $(TRAEFIK_ENVS) $(TRAEFIK_MOUNT) "$(TRAEFIK_DEV_IMAGE)"
 DOCKER_RUN_TRAEFIK := docker run $(INTEGRATION_OPTS) -it $(DOCKER_RUN_OPTS)
 DOCKER_RUN_TRAEFIK_NOTTY := docker run $(INTEGRATION_OPTS) -i $(DOCKER_RUN_OPTS)
+DOCKER_RUN_DOC_PORT := 8000
+DOCKER_RUN_DOC_MOUNT := -v $(CURDIR):/mkdocs
+DOCKER_RUN_DOC_OPTS := --rm $(DOCKER_RUN_DOC_MOUNT) -p $(DOCKER_RUN_DOC_PORT):8000
 
 
 print-%: ; @echo $*=$($*)
@@ -89,6 +93,12 @@ image-dirty: binary ## build a docker traefik image
 image: clear-static binary ## clean up static directory and build a docker traefik image
 	docker build -t $(TRAEFIK_IMAGE) .
 
+docs: docs-image
+	docker run  $(DOCKER_RUN_DOC_OPTS) $(TRAEFIK_DOC_IMAGE) mkdocs serve
+
+docs-image:
+	docker build -t $(TRAEFIK_DOC_IMAGE) -f docs.Dockerfile .
+
 clear-static:
 	rm -rf static
 

docs.Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine
+
+ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/.local/bin
+
+COPY requirements.txt /mkdocs/
+WORKDIR /mkdocs
+
+RUN apk --update upgrade \
+&& apk --no-cache --no-progress add py-pip \
+&& rm -rf /var/cache/apk/* \
+&& pip install --user -r requirements.txt

mkdocs.yml

@@ -2,6 +2,7 @@ site_name: Træfik
 site_description: Træfik Documentation
 site_author: containo.us
 site_url: https://docs.traefik.io
+dev_addr: 0.0.0.0:8000
 
 repo_name: 'GitHub'
 repo_url: 'https://github.com/containous/traefik'