Now matches docker version instead of our own versions. (#576)

images/dind/Dockerfile

@@ -1,4 +1,4 @@
-FROM docker:17.09-dind
+FROM docker:17.11-dind
 
 RUN apk add --no-cache ca-certificates
 

images/dind/README.md

@@ -1,4 +1,16 @@
+# Docker-in-Docker Base Image
+
 This is the base image for all docker-in-docker images.
 
 The difference between this and the official `docker` images are that this will choose the best
 filesystem automatically. The official ones use `vfs` (bad) by default unless you pass in a flag.
+
+## Usage
+
+Just use this as your base image and use CMD for your program, **NOT ENTRYPOINT**. This will handle the rest.
+
+```Dockerfile
+FROM fnproject/dind
+# OTHER STUFF
+CMD ["./myproggie"]
+```

images/dind/VERSION

@@ -1 +0,0 @@
-0.1.6

images/dind/release.sh

@@ -2,9 +2,9 @@ set -e
 
 ./build.sh
 
-docker run --rm -v "$PWD":/app treeder/bump patch
-version=`cat VERSION`
-echo "version $version"
+# Match version with Docker version
+version=$(docker run --rm -v "$PWD":/app treeder/bump  --extract --input "`docker -v`")
+echo "Version: $version"
 
 docker tag fnproject/dind:latest fnproject/dind:$version