Update plugin

[nigelgbanks]

Drops support for non-buildkit builds. Adds the following:

• multi-arch builds (amd64, arm64, etc)
• custom build of confd to support arm64
• unique build caches per image (should reduce cache misses)
• fixes fits (mediainfo, exifdata, file info)
• update gradle version to latest (match plugin)
• child images of tomcat can override tomcat properties
• child images of nginx can override php/nginx properties
• updated to use latest alpine 3.13
• php is no 7.4
• imagemagick only builds what is required (no longer make clibs, etc)
• general refactors

[nigelgbanks]

Should merge this before hand: Islandora-Devops/isle-gradle-docker-plugin#7

[dannylamb]

I tried building and I got this:

danny@danny-XPS-13-7390:~/Code/Islandora/isle-buildkit$ ./gradlew build
Downloading https://services.gradle.org/distributions/gradle-6.8.3-bin.zip
..........10%..........20%..........30%...........40%..........50%..........60%..........70%...........80%..........90%..........100%

Welcome to Gradle 6.8.3!

Here are the highlights of this release:
 - Faster Kotlin DSL script compilation
 - Vendor selection for Java toolchains
 - Convenient execution of tasks in composite builds
 - Consistent dependency resolution

For more details see https://docs.gradle.org/6.8.3/release-notes.html

Starting a Gradle Daemon (subsequent builds will be faster)

> Task :isle-gradle-docker-plugin:compileKotlin FAILED
e: /home/danny/Code/Islandora/isle-buildkit/.gradle/vcs-1/isle-gradl_9a6ae2w5ycft6mz6c3jekfhpo/isle-gradle-docker-plugin/src/main/kotlin/tasks/DockerBuild.kt: (8, 53): Symbol is declared in module 'java.xml' which does not export package 'com.sun.org.apache.xpath.internal.operations'

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':isle-gradle-docker-plugin:compileKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1m 5s

I'm trying to debug but I'm not sure how to tell if I'm getting the right version of the plugin or if maybe i'm using an older cached version.

[dannylamb]

This appears to be working fine after some basic tests using isle-dc.