Update markdown language hints to work with "rouge"

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

app-template/working-with-template.md

@@ -90,7 +90,7 @@ The NodeJS service contains the following files:
 
 `my-service/Dockerfile`
 
-```conf
+```dockerfile
 FROM alpine
 COPY assets /assets
 CMD ["cp", "/assets", "/project"]
@@ -113,7 +113,7 @@ services:
 
 `my-service/assets/Dockerfile`
 
-```conf
+```dockerfile
 FROM NODE:9
 WORKDIR /app
 COPY package.json .
@@ -252,7 +252,7 @@ is used to interpolate the variables. Therefore, we provide a utility called
 To use the `interpolator` image, update `my-service/Dockerfile` to use the
 following Dockerfile:
 
-```conf
+```dockerfile
 FROM dockertemplate/interpolator:v0.1.5
 COPY assets .
 ```
@@ -264,7 +264,7 @@ This places the  interpolator image in the `/assets` folder and copies the
 folder to the target `/project` folder. If you prefer to do this manually, use
 a Dockerfile instead:
 
-```conf
+```dockerfile
 WORKDIR /assets
 CMD ["/interpolator", "-config", "/run/configuration", "-source", "/assets", "-destination", "/project"]
 ```

compose/aspnet-mssql-compose.md

@@ -42,7 +42,7 @@ configure this app to use our SQL Server database, and then create a
 
 1.  Create a `Dockerfile` within your app directory and add the following content:
 
-    ```conf
+    ```dockerfile
     FROM microsoft/dotnet:2.1-sdk
     COPY . /app
     WORKDIR /app

config/containers/multi-service_container.md

@@ -75,7 +75,7 @@ this in a few different ways.
 
   Next, the Dockerfile:
 
-  ```conf
+  ```dockerfile
   FROM ubuntu:latest
   COPY my_first_process my_first_process
   COPY my_second_process my_second_process
@@ -88,7 +88,6 @@ this in a few different ways.
   the main process) then you can use bash's job control to facilitate that.
   First, the wrapper script:
 
-
 ```bash
 #!/bin/bash
 
@@ -110,7 +109,7 @@ this in a few different ways.
 fg %1
 ```
 
-  ```conf
+```dockerfile
 FROM ubuntu:latest
 COPY my_main_process my_main_process
 COPY my_helper_process my_helper_process
@@ -127,7 +126,7 @@ this in a few different ways.
   and `my_second_process` files all exist in the same directory as your
   Dockerfile.
 
-  ```conf
+```dockerfile
 FROM ubuntu:latest
 RUN apt-get update && apt-get install -y supervisor
 RUN mkdir -p /var/log/supervisor

develop/dev-best-practices.md

@@ -35,12 +35,12 @@ keep image size small:
     fragments. The first creates two layers in the image, while the second
     only creates one.
 
-    ```conf
+    ```dockerfile
     RUN apt-get -y update
     RUN apt-get install -y python
     ```
 
-    ```conf
+    ```dockerfile
     RUN apt-get -y update && apt-get install -y python
     ```
 

develop/develop-images/baseimages.md

@@ -69,7 +69,7 @@ run it, or tag any image with the name `scratch`. Instead, you can refer to it
 in your `Dockerfile`. For example, to create a minimal container using
 `scratch`:
 
-```Dockerfile
+```dockerfile
 FROM scratch
 ADD hello /
 CMD ["/hello"]

develop/develop-images/build_enhancements.md

@@ -171,7 +171,7 @@ To request SSH access for a `RUN` command in the `Dockerfile`, define a mount wi
 
 Here is an example Dockerfile using SSH in the container:
 
-```Dockerfile
+```dockerfile
 # syntax=docker/dockerfile:experimental
 FROM alpine
 

develop/develop-images/dockerfile_best-practices.md

@@ -22,7 +22,7 @@ A Docker image consists of read-only layers each of which represents a
 Dockerfile  instruction. The layers are stacked and each one is a delta of the
 changes from the previous layer. Consider this `Dockerfile`:
 
-```Dockerfile
+```dockerfile
 FROM ubuntu:18.04
 COPY . /app
 RUN make /app
@@ -270,7 +270,7 @@ frequently changed:
 
 A Dockerfile for a Go application could look like:
 
-```Dockerfile
+```dockerfile
 FROM golang:1.11-alpine AS build
 
 # Install tools required for project
@@ -346,7 +346,7 @@ review. Adding a space before a backslash (`\`) helps as well.
 
 Here’s an example from the [`buildpack-deps` image](https://github.com/docker-library/buildpack-deps):
 
-```Dockerfile
+```dockerfile
 RUN apt-get update && apt-get install -y \
   bzr \
   cvs \
@@ -418,7 +418,7 @@ The following examples show the different acceptable formats. Explanatory commen
 > Strings with spaces must be quoted **or** the spaces must be escaped. Inner
 > quote characters (`"`), must also be escaped.
 
-```Dockerfile
+```dockerfile
 # Set one or more individual labels
 LABEL com.example.version="0.0.1-beta"
 LABEL vendor1="ACME Incorporated"
@@ -432,14 +432,14 @@ to combine all labels into a single `LABEL` instruction, to prevent extra layers
 from being created. This is no longer necessary, but combining labels is still
 supported.
 
-```Dockerfile
+```dockerfile
 # Set multiple labels on one line
 LABEL com.example.version="0.0.1-beta" com.example.release-date="2015-02-12"
 ```
 
 The above can also be written as:
 
-```Dockerfile
+```dockerfile
 # Set multiple labels at once, using line-continuation characters to break long lines
 LABEL vendor=ACME\ Incorporated \
       com.example.is-beta= \
@@ -478,7 +478,7 @@ know there is a particular package, `foo`, that needs to be updated, use
 Always combine `RUN apt-get update` with `apt-get install` in the same `RUN`
 statement. For example:
 
-```Dockerfile
+```dockerfile
 RUN apt-get update && apt-get install -y \
     package-bar \
     package-baz \
@@ -489,7 +489,7 @@ Using `apt-get update` alone in a `RUN` statement causes caching issues and
 subsequent `apt-get install` instructions fail. For example, say you have a
 Dockerfile:
 
-```Dockerfile
+```dockerfile
 FROM ubuntu:18.04
 RUN apt-get update
 RUN apt-get install -y curl
@@ -498,7 +498,7 @@ RUN apt-get install -y curl
 After building the image, all layers are in the Docker cache. Suppose you later
 modify `apt-get install` by adding extra package:
 
-```Dockerfile
+```dockerfile
 FROM ubuntu:18.04
 RUN apt-get update
 RUN apt-get install -y curl nginx
@@ -516,7 +516,7 @@ intervention. This technique is known as "cache busting". You can also achieve
 cache-busting by specifying a package version. This is known as version pinning,
 for example:
 
-```Dockerfile
+```dockerfile
 RUN apt-get update && apt-get install -y \
     package-bar \
     package-baz \
@@ -530,7 +530,7 @@ in required packages.
 Below is a well-formed `RUN` instruction that demonstrates all the `apt-get`
 recommendations.
 
-```Dockerfile
+```dockerfile
 RUN apt-get update && apt-get install -y \
     aufs-tools \
     automake \
@@ -564,7 +564,7 @@ refreshed prior to `apt-get install`.
 
 Some `RUN` commands depend on the ability to pipe the output of one command into another, using the pipe character (`|`), as in the following example:
 
-```Dockerfile
+```dockerfile
 RUN wget -O - https://some.site | wc -l > /number
 ```
 
@@ -577,7 +577,7 @@ If you want the command to fail due to an error at any stage in the pipe,
 prepend `set -o pipefail &&` to ensure that an unexpected error prevents the
 build from inadvertently succeeding. For example:
 
-```Dockerfile
+```dockerfile
 RUN set -o pipefail && wget -O - https://some.site | wc -l > /number
 ```
 > Not all shells support the `-o pipefail` option.
@@ -586,7 +586,7 @@ RUN set -o pipefail && wget -O - https://some.site | wc -l > /number
 > Debian-based images, consider using the _exec_ form of `RUN` to explicitly
 > choose a shell that does support the `pipefail` option. For example:
 >
-> ```Dockerfile
+> ```dockerfile
 > RUN ["/bin/bash", "-c", "set -o pipefail && wget -O - https://some.site | wc -l > /number"]
 > ```
 
@@ -641,7 +641,7 @@ variables specific to services you wish to containerize, such as Postgres’s
 Lastly, `ENV` can also be used to set commonly used version numbers so that
 version bumps are easier to maintain, as seen in the following example:
 
-```Dockerfile
+```dockerfile
 ENV PG_MAJOR 9.3
 ENV PG_VERSION 9.3.4
 RUN curl -SL http://example.com/postgres-$PG_VERSION.tar.xz | tar -xJC /usr/src/postgress && …
@@ -657,7 +657,7 @@ means that even if you unset the environment variable in a future layer, it
 still persists in this layer and its value can't be dumped. You can test this by
 creating a Dockerfile like the following, and then building it.
 
-```Dockerfile
+```dockerfile
 FROM alpine
 ENV ADMIN_USER="mark"
 RUN echo $ADMIN_USER > ./mark
@@ -678,7 +678,7 @@ good idea. Using `\` as a line continuation character for Linux Dockerfiles
 improves readability. You could also put all of the commands into a shell script
 and have the `RUN` command just run that shell script.
 
-```Dockerfile
+```dockerfile
 FROM alpine
 RUN export ADMIN_USER="mark" \
     && echo $ADMIN_USER > ./mark \
@@ -711,7 +711,7 @@ the specifically required files change.
 
 For example:
 
-```Dockerfile
+```dockerfile
 COPY requirements.txt /tmp/
 RUN pip install --requirement /tmp/requirements.txt
 COPY . /tmp/
@@ -726,7 +726,7 @@ delete the files you no longer need after they've been extracted and you don't
 have to add another layer in your image. For example, you should avoid doing
 things like:
 
-```Dockerfile
+```dockerfile
 ADD http://example.com/big.tar.xz /usr/src/things/
 RUN tar -xJf /usr/src/things/big.tar.xz -C /usr/src/things
 RUN make -C /usr/src/things all
@@ -734,7 +734,7 @@ RUN make -C /usr/src/things all
 
 And instead, do something like:
 
-```Dockerfile
+```dockerfile
 RUN mkdir -p /usr/src/things \
     && curl -SL http://example.com/big.tar.xz \
     | tar -xJC /usr/src/things \
@@ -754,7 +754,7 @@ default flags).
 
 Let's start with an example of an image for the command line tool `s3cmd`:
 
-```Dockerfile
+```dockerfile
 ENTRYPOINT ["s3cmd"]
 CMD ["--help"]
 ```
@@ -808,7 +808,7 @@ exec "$@"
 The helper script is copied into the container and run via `ENTRYPOINT` on
 container start:
 
-```Dockerfile
+```dockerfile
 COPY ./docker-entrypoint.sh /
 ENTRYPOINT ["/docker-entrypoint.sh"]
 CMD ["postgres"]

develop/develop-images/multistage-build.md

@@ -37,7 +37,7 @@ builder pattern above:
 
 **`Dockerfile.build`**:
 
-```conf
+```dockerfile
 FROM golang:1.7.3
 WORKDIR /go/src/github.com/alexellis/href-counter/
 COPY app.go .
@@ -52,7 +52,7 @@ and forget to continue the line using the `\` character, for example.
 
 **`Dockerfile`**:
 
-```conf
+```dockerfile
 FROM alpine:latest  
 RUN apk --no-cache add ca-certificates
 WORKDIR /root/
@@ -97,7 +97,7 @@ multi-stage builds.
 
 **`Dockerfile`**:
 
-```conf
+```dockerfile
 FROM golang:1.7.3
 WORKDIR /go/src/github.com/alexellis/href-counter/
 RUN go get -d -v golang.org/x/net/html  
@@ -136,7 +136,7 @@ example improves the previous one by naming the stages and using the name in
 the `COPY` instruction. This means that even if the instructions in your
 Dockerfile are re-ordered later, the `COPY` doesn't break.
 
-```conf
+```dockerfile
 FROM golang:1.7.3 AS builder
 WORKDIR /go/src/github.com/alexellis/href-counter/
 RUN go get -d -v golang.org/x/net/html  
@@ -177,7 +177,7 @@ copy from a separate image, either using the local image name, a tag available
 locally or on a Docker registry, or a tag ID. The Docker client pulls the image
 if necessary and copies the artifact from there. The syntax is:
 
-```Dockerfile
+```dockerfile
 COPY --from=nginx:latest /etc/nginx/nginx.conf /nginx.conf
 ```
 
@@ -185,7 +185,7 @@ COPY --from=nginx:latest /etc/nginx/nginx.conf /nginx.conf
 
 You can pick up where a previous stage left off by referring to it when using the `FROM` directive. For example:
 
-```Dockerfile
+```dockerfile
 FROM alpine:latest as builder
 RUN apk --no-cache add build-base
 

docker-hub/publish/publish.md

@@ -100,7 +100,7 @@ containerized application. To avoid this, you can:
   `curl` and `python-pip` after they are used to install the Python `requests`
   package, all in a single Dockerfile directive:
 
-  ```shell
+  ```dockerfile
   RUN apt-get update && \
            apt-get install -y --no-install-recommends curl python-pip && \
            pip install requests && \

engine/examples/postgresql_service.md

@@ -16,7 +16,7 @@ This PostgreSQL setup is for development-only purposes. Refer to the
 PostgreSQL documentation to fine-tune these settings so that it is
 suitably secure.
 
-```conf
+```dockerfile
 #
 # example Dockerfile for https://docs.docker.com/engine/examples/postgresql_service/
 #

engine/examples/running_ssh_service.md

@@ -19,7 +19,7 @@ quick access to a test container. Make the following substitutions:
 - With `RUN echo 'root:THEPASSWORDYOUCREATED' | chpasswd`, replace "THEPASSWORDYOUCREATED" with the password you've previously generated.
 - With `RUN sed -i 's/PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config`, use `without-password` instead of `prohibit-password` for Ubuntu 14.04.
 
-```Dockerfile
+```dockerfile
 FROM ubuntu:16.04
 
 RUN apt-get update && apt-get install -y openssh-server

engine/security/trust/trust_automation.md

@@ -74,7 +74,7 @@ You can also build with content trust. Before running the `docker build` command
 you should set the environment variable `DOCKER_CONTENT_TRUST` either manually or 
 in a scripted fashion. Consider the simple Dockerfile below.
 
-```Dockerfile
+```dockerfile
 FROM docker/trusttest:latest
 RUN echo
 ```

engine/swarm/stack-deploy.md

@@ -104,7 +104,7 @@ counter whenever you visit it.
 
 4.  Create a file called `Dockerfile` and paste this in:
 
-    ```Dockerfile
+    ```dockerfile
     FROM python:3.4-alpine
     ADD . /code
     WORKDIR /code

storage/storagedriver/index.md

@@ -29,7 +29,7 @@ A Docker image is built up from a series of layers. Each layer represents an
 instruction in the image's Dockerfile. Each layer except the very last one is
 read-only. Consider the following Dockerfile:
 
-```conf
+```dockerfile
 FROM ubuntu:18.04
 COPY . /app
 RUN make /app
@@ -163,7 +163,7 @@ Docker 1.10).
 Now imagine that you have two different Dockerfiles. You use the first one to
 create an image called `acme/my-base-image:1.0`.
 
-```conf
+```dockerfile
 FROM ubuntu:18.04
 COPY . /app
 ```
@@ -171,7 +171,7 @@ COPY . /app
 The second one is based on `acme/my-base-image:1.0`, but has some additional
 layers:
 
-```conf
+```dockerfile
 FROM acme/my-base-image:1.0
 CMD /app/hello.sh
 ```