develop/develop-images: use "console" for shell examples

This allows for easier copying of the commands, without selecting the
prompt.

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

develop/develop-images/baseimages.md

@@ -73,8 +73,8 @@ Assuming you built the "hello" executable example by using the source code at
 and you compiled it with the `-static` flag, you can build this Docker
 image using this `docker build` command:
 
-```bash
+```console
-docker build --tag hello .
+$ docker build --tag hello .
 ```
 
 Don't forget the `.` character at the end, which sets the build context to the
@@ -84,7 +84,7 @@ current directory.
 > you need a Linux binary, rather than a Mac or Windows binary.
 > You can use a Docker container to build it:
 >
-> ```bash
+> ```console
 > $ docker run --rm -it -v $PWD:/build ubuntu:20.04
 >
 > container# apt-get update && apt-get install build-essential
@@ -94,8 +94,8 @@ current directory.
 
 To run your new image, use the `docker run` command:
 
-```bash
+```console
-docker run --rm hello
+$ docker run --rm hello
 ```
 
 This example creates the hello-world image used in the tutorials.

develop/develop-images/build_enhancements.md

@@ -37,7 +37,7 @@ the [Dockerfile reference](/engine/reference/builder/) page.
 Easiest way from a fresh install of docker is to set the `DOCKER_BUILDKIT=1`
 environment variable when invoking the `docker build` command, such as:
 
-```bash
+```console
 $ DOCKER_BUILDKIT=1 docker build .
 ```
 
@@ -226,7 +226,7 @@ RUN --mount=type=ssh git clone git@github.com:myorg/myproject.git myproject
 Once the `Dockerfile` is created, use the `--ssh` option for connectivity with
 the SSH agent.
 
-```bash
+```console
 $ docker build --ssh default .
 ```
 

develop/develop-images/dockerfile_best-practices.md

@@ -73,21 +73,21 @@ context.
 > a text file named `hello` and create a Dockerfile that runs `cat` on it. Build
 > the image from within the build context (`.`):
 >
-> ```shell
+> ```console
-> mkdir myproject && cd myproject
+> $ mkdir myproject && cd myproject
-> echo "hello" > hello
+> $ echo "hello" > hello
-> echo -e "FROM busybox\nCOPY /hello /\nRUN cat /hello" > Dockerfile
+> $ echo -e "FROM busybox\nCOPY /hello /\nRUN cat /hello" > Dockerfile
-> docker build -t helloapp:v1 .
+> $ docker build -t helloapp:v1 .
 > ```
 >
 > Move `Dockerfile` and `hello` into separate directories and build a second
 > version of the image (without relying on cache from the last build). Use `-f`
 > to point to the Dockerfile and specify the directory of the build context:
 >
-> ```shell
+> ```console
-> mkdir -p dockerfiles context
+> $ mkdir -p dockerfiles context
-> mv Dockerfile dockerfiles && mv hello context
+> $ mv Dockerfile dockerfiles && mv hello context
-> docker build --no-cache -t helloapp:v2 -f dockerfiles/Dockerfile context
+> $ docker build --no-cache -t helloapp:v2 -f dockerfiles/Dockerfile context
 > ```
 
 Inadvertently including files that are not necessary for building an image
@@ -664,7 +664,7 @@ RUN echo $ADMIN_USER > ./mark
 RUN unset ADMIN_USER
 ```
 
-```bash
+```console
 $ docker run --rm test sh -c 'echo $ADMIN_USER'
 
 mark
@@ -687,7 +687,7 @@ RUN export ADMIN_USER="mark" \
 CMD sh
 ```
 
-```bash
+```console
 $ docker run --rm test sh -c 'echo $ADMIN_USER'
 
 ```
@@ -762,13 +762,13 @@ CMD ["--help"]
 
 Now the image can be run like this to show the command's help:
 
-```bash
+```console
 $ docker run s3cmd
 ```
 
 Or using the right parameters to execute a command:
 
-```bash
+```console
 $ docker run s3cmd ls s3://mybucket
 ```
 
@@ -819,19 +819,19 @@ This script allows the user to interact with Postgres in several ways.
 
 It can simply start Postgres:
 
-```bash
+```console
 $ docker run postgres
 ```
 
 Or, it can be used to run Postgres and pass parameters to the server:
 
-```bash
+```console
 $ docker run postgres postgres --help
 ```
 
 Lastly, it could also be used to start a totally different tool, such as Bash:
 
-```bash
+```console
 $ docker run --rm -it postgres bash
 ```
 

develop/develop-images/multistage-build.md

@@ -116,7 +116,7 @@ CMD ["./app"]
 You only need the single Dockerfile. You don't need a separate build script,
 either. Just run `docker build`.
 
-```bash
+```console
 $ docker build -t alexellis2/href-counter:latest .
 ```
 
@@ -160,7 +160,7 @@ Dockerfile including every stage. You can specify a target build stage. The
 following command assumes you are using the previous `Dockerfile` but stops at
 the stage named `builder`:
 
-```bash
+```console
 $ docker build --target builder -t alexellis2/href-counter:latest .
 ```