Update Epubcheck to v5.0.0

Dockerfile

@@ -1,11 +1,11 @@
 FROM alpine:3.3
 
-ARG VERSION=4.2.6
+ARG VERSION=5.0.0
 
 RUN set -eux; \
   apk add --no-cache \
     curl \
-    openjdk7 \
+    openjdk8 \
     unzip \
   && \
   curl -fsSL \

README.md

@@ -7,13 +7,13 @@ Dockerfile for [EPUBCheck](https://github.com/w3c/epubcheck), available on [Dock
 Run the PowerShell script:
 
 ```powershell
-.\build.ps1 -Version "4.2.6"
+.\build.ps1 -Version "5.0.0"
 ```
 
 Or run directly with:
 
 ```bash
-docker build --build-arg "EPUBCHECK_VERSION=4.2.6" --tag "epubcheck:4.2.6" .
+docker build --build-arg "EPUBCHECK_VERSION=5.0.0" --tag "epubcheck:5.0.0" .
 ```
 
 ## Usage
@@ -23,26 +23,24 @@ docker build --build-arg "EPUBCHECK_VERSION=4.2.6" --tag "epubcheck:4.2.6" .
 Displays the version of EPUBCheck.
 
 ```bash
-docker run --rm --name epubcheck "epubcheck:4.2.6"
+docker run --rm --name epubcheck "epubcheck:5.0.0"
 ```
 
 ```plaintext
-EPUBCheck v4.2.6
+EPUBCheck v5.0.0
 EPUBCheck completed
-No file specified in the arguments. Exiting.
 ```
 
 ### Help
 
 Displays help information for EPUBCheck.
 
 ```bash
-docker run --rm --name epubcheck "epubcheck:4.2.6" --help
+docker run --rm --name epubcheck "epubcheck:5.0.0" --help
 ```
 
 ```plaintext
-No file specified in the arguments. Exiting.
-EPUBCheck v4.2.6
+EPUBCheck v5.0.0
 
 When running this tool, the first argument should be the name (with the path)
 of the file to check.

build.ps1

@@ -2,7 +2,7 @@
 param (
     [Parameter(Mandatory = $false)]
     [String]
-    $Version = "4.2.6"
+    $Version = "5.0.0"
 )
 
 begin {
@@ -13,11 +13,10 @@ process {
     $imageName = "kitforbes/epubcheck"
     docker build `
         --tag "${imageName}:${Version}" `
+        --tag "${imageName}:latest" `
         --build-arg "EPUBCHECK_VERSION=$Version" `
         $PSScriptRoot
 
-    docker tag "${imageName}:${Version}" "${imageName}:latest"
-
     docker images "$imageName"
 
     docker run --rm `