Prepare for initial release

CONTRIBUTING.md

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+# Contributing
+
+The Snowplow v3 Ecommerce GTM Tag Template is maintained by the Engineering team at Snowplow. We welcome suggestions for improvements and bug fixes to all Snowplow GTM Repositories.
+
+We are extremely grateful for all contributions we receive, whether that is reporting an issue or a change to the code which can be made in the form of a pull request.
+
+For support requests, please use our community support Discourse forum: https://discourse.snowplow.io/.
+
+## Setting up an Environment
+
+Instructions on how to build and run tests are available in the [README.md](README.md). The README will also list any requirements that you will need to install first before being able to build and run the tests.
+
+You should ensure you are comfortable building and testing the existing release before adding new functionality or fixing issues.
+
+## Issues
+
+### Creating an issue
+
+The project contains an issue template which should help guiding you through the process. However, please keep in mind that support requests should go to our Discourse forum: https://discourse.snowplow.io/ and not GitHub issues.
+
+It's also a good idea to log an issue before starting to work on a pull request to discuss it with the maintainers. A pull request is just one solution to a problem and it is often a good idea to talk about the problem with the maintainers first.
+
+### Working on an issue
+
+If you see an issue you would like to work on, please let us know in the issue! That will help us in terms of scheduling and
+not doubling the amount of work.
+
+If you don't know where to start contributing, you can look at
+[the issues labeled `good first issue`](https://github.com/snowplow/snowplow-gtm-tag-template-ecommerce-v3/labels/good%20first%20issue).
+
+## Pull requests
+
+These are a few guidelines to keep in mind when opening pull requests.
+
+### Guidelines
+
+Please supply a good PR description. These are very helpful and help the maintainers to understand _why_ the change has been made, not just _what_ changes have been made.
+
+Please try and keep your PR to a single feature of fix. This might mean breaking up a feature into multiple PRs but this makes it easier for the maintainers to review and also reduces the risk in each change.
+
+Please review your own PR as you would do it you were a reviewer first. This is a great way to spot any mistakes you made when writing the change. Additionally, ensure your code compiles and all tests pass.
+
+### Commit hygiene
+
+We keep a strict 1-to-1 correspondance between commits and issues, as such our commit messages are formatted in the following
+fashion:
+
+`Issue Description (closes #1234)`
+
+for example:
+
+`Fix Issue with Tracker (closes #1234)`
+
+### Writing tests
+
+Whenever necessary, it's good practice to add the corresponding tests to whichever feature you are working on.
+Any non-trivial PR must have tests and will not be accepted without them.
+
+### Feedback cycle
+
+Reviews should happen fairly quickly during weekdays.
+If you feel your pull request has been forgotten, please ping one or more maintainers in the pull request.
+
+### Getting your pull request merged
+
+If your pull request is fairly chunky, there might be a non-trivial delay between the moment the pull request is approved and the moment it gets merged. This is because your pull request will have been scheduled for a specific milestone which might or might not be actively worked on by a maintainer at the moment.
+
+### Contributor license agreement
+
+We require outside contributors to sign a Contributor license agreement (or CLA) before we can merge their pull requests.
+You can find more information on the topic in [the dedicated page](https://docs.snowplow.io/docs/contributing/contributor-license-agreement/).
+The @snowplowcla bot will guide you through the process.
+
+## Getting in touch
+
+### Community support requests
+
+Please do not log an issue if you are asking for support, all of our community support requests go through our Discourse forum: https://discourse.snowplow.io/.
+
+Posting your problem there ensures more people will see it and you should get support faster than creating a new issue on GitHub. Please do create a new issue on GitHub if you think you've found a bug though!

README.md

@@ -1,3 +1,110 @@
-# Snowplow v3 Ecommerce Custom GTM Template
+# Snowplow v3 Ecommerce GTM Tag Template
 
-A GTM Tag template for implementing Ecommerce tracking using Snowplow JavaScript tracker v3 and its Snowplow Ecommerce plugin.
+[![early-release]][tracker-classification]
+[![License][license-image]][license]
+[![Release][release-image]][releases]
+
+[Snowplow][snowplow] is a scalable open-source platform for rich, high quality, low-latency data collection. It is designed to collect high quality, complete behavioral data for enterprise business.
+
+## Overview
+
+This is a Google Tag Manager [custom tag template][gtm-custom-template] for implementing Ecommerce tracking using the [Snowplow JavaScript tracker v3][javascript-tracker] and its [Snowplow Ecommerce plugin][snowplow-ecommerce-plugin].
+
+It has been designed to be used with the [Snowplow v3 Settings variable template][gtm-v3-settings-variable] and can be implemented along the [Snowplow v3 tag template][gtm-v3-tag].
+
+## Quickstart
+
+### Installing from the Google Tag Manager Gallery
+
+_Coming soon!_
+
+### Manual Installation
+
+To manually install the tag template:
+
+1. Download `template.tpl`
+2. Create a new Tag template in the Templates section of your GTM container
+3. Click the More Actions menu and select Import
+4. Import `template.tpl` downloaded in Step 1
+5. Click Save.
+
+## Find out more
+
+| Technical Docs                    |
+|-----------------------------------|
+| [![i1][techdocs-image]][techdocs] |
+| [Technical Docs][techdocs]        |
+
+## Maintainer Quickstart
+
+Work on the template should be done in Google Tag Manager's native **template editor**. This is to ensure the template has access to all the latest features of the template editor, and to make sure it passes GTM's own validation when exporting the changes.
+
+To **import** the template into Google Tag Manager:
+
+1. In a Google Tag Manager **web** container, browse to **Templates** and click to create a new template.
+2. From the template action menu, choose **Import**.
+3. Locate the `template.tpl` file from this repo, and import it into the template editor.
+
+Make the changes you wish. Make sure the unit tests pass (in the **Tests** tab of the editor). Update the tests if necessary.
+
+Once you're done, follow these steps:
+
+1. **Save** the template in the template editor.
+2. From the action menu, choose **Export**.
+3. Replace the `template.tpl` file in this repo with the exported file (make sure to keep `template.tpl` as its name).
+4. **Commit** the changes to the `template.tpl` file and repeat if necessary.
+5. Copy the last **commit hash**.
+6. Edit `metadata.yaml` in the template folder, and add the hash with its `changeNotes` as the latest version.
+7. Move the previous latest version into the list of `Older versions`.
+8. Save changes to `metadata.yaml` and **commit** them using a **Prepare for x.y.z release** commit message.
+9. Finally, push the changes to the repo (should include at least 2 commits as described above).
+
+Once the tag is published in the GTM [community gallery][gtm-gallery] the template will be updated automatically within some time after the changes.
+
+## Contributing
+
+Feedback and contributions are welcome! If you have identified a bug, please log an issue on this repo. For all other feedback, discussion or questions please open a thread on our [discourse forum][discourse].
+
+| Contributing                              |
+|-------------------------------------------|
+| [![i2][contributing-image]][contributing] |
+| [Contributing][contributing]              |
+
+## Copyright and license
+
+Copyright (c) 2023 Snowplow Analytics Ltd.
+
+Licensed under the **[Apache License, Version 2.0][license]** (the "License");
+you may not use this software except in compliance with the License.
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+[tracker-classification]: https://docs.snowplow.io/docs/collecting-data/collecting-from-own-applications/tracker-maintenance-classification/
+[early-release]: https://img.shields.io/static/v1?style=flat&label=Snowplow&message=Early%20Release&color=014477&labelColor=9ba0aa&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAeFBMVEVMaXGXANeYANeXANZbAJmXANeUANSQAM+XANeMAMpaAJhZAJeZANiXANaXANaOAM2WANVnAKWXANZ9ALtmAKVaAJmXANZaAJlXAJZdAJxaAJlZAJdbAJlbAJmQAM+UANKZANhhAJ+EAL+BAL9oAKZnAKVjAKF1ALNBd8J1AAAAKHRSTlMAa1hWXyteBTQJIEwRgUh2JjJon21wcBgNfmc+JlOBQjwezWF2l5dXzkW3/wAAAHpJREFUeNokhQOCA1EAxTL85hi7dXv/E5YPCYBq5DeN4pcqV1XbtW/xTVMIMAZE0cBHEaZhBmIQwCFofeprPUHqjmD/+7peztd62dWQRkvrQayXkn01f/gWp2CrxfjY7rcZ5V7DEMDQgmEozFpZqLUYDsNwOqbnMLwPAJEwCopZxKttAAAAAElFTkSuQmCC
+
+[license]: https://www.apache.org/licenses/LICENSE-2.0
+[license-image]: https://img.shields.io/badge/license-Apache--2-blue.svg?style=flat
+
+[releases]: https://github.com/snowplow/snowplow-gtm-tag-template-ecommerce-v3/releases
+[release-image]: https://img.shields.io/github/v/release/snowplow/snowplow-gtm-tag-template-ecommerce-v3
+
+[snowplow]: https://snowplow.io
+[discourse]: https://discourse.snowplow.io
+
+[gtm-v3-tag]: https://docs.snowplow.io/docs/collecting-data/collecting-from-own-applications/javascript-trackers/web-tracker/google-tag-manager-custom-template/tag-template-guide/
+[gtm-v3-settings-variable]: https://docs.snowplow.io/docs/collecting-data/collecting-from-own-applications/javascript-trackers/web-tracker/google-tag-manager-custom-template/settings-variable-guide/
+[javascript-tracker]: https://docs.snowplow.io/docs/collecting-data/collecting-from-own-applications/javascript-trackers/
+[snowplow-ecommerce-plugin]: https://docs.snowplow.io/docs/collecting-data/collecting-from-own-applications/javascript-trackers/web-tracker/plugins/snowplow-ecommerce/
+
+[techdocs]: https://docs.snowplow.io
+[techdocs-image]: https://d3i6fms1cm1j0i.cloudfront.net/github/images/techdocs.png
+
+[contributing-image]: https://d3i6fms1cm1j0i.cloudfront.net/github/images/contributing.png
+[contributing]: CONTRIBUTING.md
+
+[gtm-custom-template]: https://developers.google.com/tag-manager/templates
+[gtm-gallery]: https://tagmanager.google.com/gallery

metadata.yaml

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+homepage: "https://snowplow.io"
+documentation: "https://docs.snowplow.io"
+versions:
+  # Latest version
+  - sha: 02e7f85c3f37eba7828348915a2579cf2c899e28
+    changeNotes: |2
+      Add initial template (#2)
+      Add GitHub actions (#1)
+  # Older versions