Update workflows and templates

Author: thespad

.github/CONTRIBUTING.md

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+# Contributing to mods
+
+## Gotchas
+
+* While contributing make sure to make all your changes before creating a Pull Request, as our pipeline builds each commit after the PR is open.
+* Read, and fill the Pull Request template
+  * If this is a fix for a typo (in code, documentation, or the README) please file an issue and let us sort it out. We do not need a PR
+  * If the PR is addressing an existing issue include, closes #\<issue number>, in the body of the PR commit message
+* If you want to discuss changes, you can also bring it up in [#dev-talk](https://discordapp.com/channels/354974912613449730/757585807061155840) in our [Discord server](https://discord.gg/YWrKVTn)

.github/PULL_REQUEST_TEMPLATE.md

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+<!--- Provide a general summary of your changes in the Title above -->
+
+[linuxserverurl]: https://linuxserver.io
+[![linuxserver.io](https://raw.githubusercontent.com/linuxserver/docker-templates/master/linuxserver.io/img/linuxserver_medium.png)][linuxserverurl]
+
+
+<!--- Before submitting a pull request please check the following -->
+
+<!---  If this is a fix for a typo (in code, documentation, or the README) please file an issue and let us sort it out. We do not need a PR  -->
+<!---  Ask yourself if this modification is something the whole userbase will benefit from, if this is a specific change for corner case functionality or plugins please look at making a Docker Mod or local script  https://blog.linuxserver.io/2019/09/14/customizing-our-containers/ -->
+<!---  That if the PR is addressing an existing issue include, closes #<issue number> , in the body of the PR commit message   -->
+<!---  You have included links to any files / patches etc your PR may be using in the body of the PR commit message -->
+<!--- We maintain a changelog of major revisions to the container at the end of readme-vars.yml in the root of this repository, please add your changes there if appropriate -->
+
+
+<!--- Coding guidelines: -->
+<!--- 1. Installed packages in the Dockerfiles should be in alphabetical order -->
+<!--- 2. Changes to Dockerfile should be replicated in Dockerfile.armhf and Dockerfile.aarch64 if applicable -->
+<!--- 3. Indentation style (tabs vs 4 spaces vs 1 space) should match the rest of the document -->
+<!--- 4. Readme is auto generated from readme-vars.yml, make your changes there -->
+
+------------------------------
+
+ - [ ] I have read the [contributing](https://github.com/linuxserver/docker-mods/blob/main/.github/CONTRIBUTING.md) guideline and understand that I have made the correct modifications
+
+------------------------------
+
+<!--- We welcome all PR’s though this doesn’t guarantee it will be accepted. -->
+
+## Description:
+<!--- Describe your changes in detail -->
+
+## Benefits of this PR and context:
+<!--- Please explain why we should accept this PR. If this fixes an outstanding bug, please reference the issue # -->
+
+## How Has This Been Tested?
+<!--- Please describe in detail how you tested your changes. -->
+<!--- Include details of your testing environment, and the tests you ran to -->
+<!--- see how your change affects other areas of the code, etc. -->
+
+
+## Source / References:
+<!--- Please include any forum posts/github links relevant to the PR -->