v3.0.0

[![listmonk-logo](https://user-images.githubusercontent.com/547147/134940003-1de03d83-8c7b-459b-8056-baa8d5f3b448.png)](https://listmonk.app)

v3.0.0 is a major release with a significant number of improvements and fixes.

# What's new?
- The concurrent core or the "engine" is completely re-written. Campaign pausing and cancellations are now near-instant and lossless. Concurrent campaign sending performance has improved significantly. The `sent` count now accounts for every single message rather than an approximation.
- Major performance improvements for large databases with the new `Settings -> Performance -> Cache slow queries` option. On installations with millions of subscribers, enabling this speeds up database queries (retrieving lists, subscribers etc.) by several orders of magnitude. On a production database with ~14 million subscribers, the speed up on the lists page was 2000x, from ~20s to ~10ms.
- New frontend dependency and build system refactor, speeding the admin pages (and the development build process).
- Addressed the root cause of mysterious SMTP sending errors that triggered only in certain SMTP environments.
- New fields for filtering lists, campaigns, subscribers in query APIs.
- Campaign archives now support “slugs” (clean permalinks) for public URLs instead of UUIDs.
- Major refactor and cleanup of documentation.
- `F9` shortcut key for campaign and template previews.
- Many quality-of-life improvements, fixes, and dependency upgrades.

## How to upgrade
As always, take a backup of your database before upgrading.

**Binary**

Download the latest binary. Stop and replace the old binary. Run `./listmonk --upgrade`. Start the app again.

**Docker**
```shell
# cd /directory/with/docker-compose.yml

docker-compose down
docker-compose pull && docker-compose run --rm app ./listmonk --upgrade
docker-compose up -d app db
```


## Changelog
* f9120d9 Auto-translate one missing i18n key..
* 36e39e5 Auto-translate missing i18n scripts.
* 8939d27 Reformat `sl` i18n language file.
* 82894e5 Simplify default e-mail template.
* dc43e9c Configure Markdown parser to not escape double quotes. Closes #1698.
* 3103bbc feat: Add Slovenian localization (#1704)
* d70236c Fix incorrect error message in tx template preview.
* 2841586 Fix sorting in camapaign analytics view counts.
* 6cb9982 Add `.IndividualTracking` to public templates. Closes #1663.
* 74ef6f5 Add a 'view' link on the lists page. Closes #1674.
* 7c44eb0 Replace Go easyjson lib.
* f14df89 Update Go deps.
* f0a3cbd Remove redundant SMTP test error toast on the admin UI.
* 45f4ae1 Add performance/query caching docs.
* 9adc5e7 Refactor navigation and styling in docs.
* bb1492b Merge branch 'query-performance'
* 5a3664a Add support for caching slow queries on large databases.
* a5b06a8 fixed railway icon and spelling bug (#1696)
* 9e96649 Update schema.sql - change default bounce settings (#1669)
* 67bc2ce Improve SES bounce processing docs (#1676)
* 98fa3e0 Update templating.md with command to fetch templates from repo (#1677)
* e42ab9c Bump vite from 5.0.10 to 5.0.12 in /frontend (#1680)
* 0935e9c Bump follow-redirects from 1.15.3 to 1.15.4 in /frontend (#1664)
* 4c5df16 Add deploy template for RepoCloud.io (#1662)
* 2f487de Log subscriber id/uuid on failed opt-in message push. Closes #1333.
* 908173c Style the 'fix code' buttn on campaign archive tab.
* d8ca26e Add a 'template reference' docs link next to campaign editor. Closes #1405.
* 9109097 Remove incorrect API def from docs. Closes #1658.
* 7067f05 Update listmonk-simple.service - add optional log file (#1640)
* 8677151 Merge branch 'slug'
* 0d319ad Add 'slug' (permalink) support for campaign archives. Closes #1394.
* 78caa35 fix: add copying campaign object before sending test message (#1659)
* 3335171 Fix (accidentally) broken migration scripts.
* 3711bed Fix clipboard copy prop on template form.
* bd2990f Add F9 shortcut key for toggling  campaign and template previews.
* 234fd11 Fix incorrect label on maintenance UI. Closes #1652.
* a93031d Make Makefile accept custom build versions from env for dev builds.
* fa2c840 Rename v2.6.0 migration to v3.0.0, the next major release.
* a6d55d6 Upgrade smtp-pool lib fixing bad conn state issues.
* 8add9d6 Merge branch 'fix-campaign-sent'
* 9a96134 Update installation.md +tut & minor changes (#1647)
* 772476c Add accurate sent count, last sent subscriber tracking on campaigns.
* 414c5c0 Refactor the core concurrent campaign manager logic.
* 0c9dc07 Add a `?v=hash` cache breaker (that changes on restart) to static assets.
* a2629c2 Make all ID/UUID labels on the UI onclick -> clipboard copy.
* b946c33 Fix broken chart components.
* 2feb1b0 Make the name part in `from` e-mails optional. Closes #1602.
* b2a5e37 Fix incorrect form messages on public re-subscription to double opt-in lists. Closes #1638.
* bce6758 Fix preconfirm option not working on bulk 'select all' subscriber list management. Closes #1646.
* 0d74619 Make providing `name` in subscriber creation optional and assign internally. Closes #1630.
* a9a7156 Scroll TinyMCE richtext editor back to caret on dialog close. Closes #1635.
* db17fa1 Restore tab selection on campaign page on reload.
* 49bbf92 Merge branch 'upgrade-frontend'
* ef77a7e Replace c3js with chart.js for major dep size reduction.
* f4b2446 Update configuration.md +logs section (#1641)
* 9bd7511 Update italian translation (#1644)
* af8b420 Refactor and upgrade the frontend vue code to work with vite instead of webpack.
* 51af75c Add subscription status filter to subscriber list query and admin UI.
* 8f12c03 Fix newly created lists not showing up on other pages automatically. Closes #1589.
* 01acd38 Add tag/type/optin filter options to lists and campaigns APIs. Closes #1631.
* c468e7a Upgrade Cypress to latest version.
* 5d63574 Skip non-existent dirs in `--static-dir` mode to use default stuffed dirs. Closes #1599.
* aba7111 Fix default non-stuffed frontend dir path.
* dd87a10 Addte listmonk-simple.service (#1622)
* 6a26580 Update general-question.md
* 9a30067 Create da.json (Danish translation) (#1628)
* 80b2537 Bump golang.org/x/crypto from 0.15.0 to 0.17.0 (#1632)
* be62c50 feat: Add `from_email` to postback struct for sending tx postbacks (#1623)
* e869f7b Translate to Ukrainian (#1606)
* b6922b0 Suppress 'no campaign' errors on pixel view registration. Closes #1588.
* 95dabe5 Update upgrade.md +binary info (#1613)
* e06d379 Update installation.md +tutorials (#1611)
* 7c99167 Update installation.md +changing port (#1607)
* fa50664 Add i18n Greek translation (#1605)
* 53eb71a Add 404 HTTP handlers to prevent those requests going to BasicAuth endpoints.
* 2ce2a11 feat: docker compose use alpine for postgres (#1603)
* 52ee79b chore: noreferrer for listmonk url in footer (#1601)
* 524be27 Bump tinymce from 5.10.8 to 5.10.9 in /frontend (#1592)
* 75befe5 📝🐛 — Fix /api/subscribers/lists doc (#1594)
* 4577868 chore: remove refs to deprecated io/ioutil (#1593)
* c59825f Fix broken sorting (lists -> subcount, subscribers -> status) in queries. Closes #1076.
* 06b4494 Fix incorrect sanitisation of search queries on list/campaign frontend.
* 82c74cd Bump golang.org/x/image from 0.6.0 to 0.10.0 (#1580)
* 4c8c19e Update configuration.md - update path due to recent install path change (#1581)
* d439ecf Bump axios from 0.27.2 to 1.6.0 in /frontend (#1587)
* ef08495 Make the unsub form on opt-in confirmation e-mail open 'manage' by default. Closes #1515.
* 44d3462 Fix 'confirmed' subscriptions becoming 'unconfirmed' on public form re-signup. Closes #1441.
* 62be5e2 Fix mysteriously broken frontend build by switching eslint parser dep.
* 49ec11c Merge branch 'refactor-docs'
* e8ecdf8 Fix mkdocs links in docs.
* ff135ec Add 'copy code' button to code snippets in docs.
* be4be72 Refactor and clean up API Markdown docs.
* f8a55f8 Fix mkdocs navbar shadow
* 9e3af91 Update fr.json (#1586)
* f720e88 Refactor hr style in mkdocs template.
* b29f565 Fix broken table in campaign doc. Closes #1585.
* 3641f74 Add missing `header` field in campaign creation docs. Closes #1561.
* ccceaa6 Bump @babel/traverse from 7.21.3 to 7.23.2 in /frontend (#1563)
* c7882bb Bump tinymce from 5.10.7 to 5.10.8 in /frontend (#1564)
* fd05a6d Update installation.md - add cd listmonk (#1576)
* 06332d5 Update de.json (#1572)
* 1ebd80c Add Hebrew translation. Closes #1517.
* 491fab3 Update i18n language files.
* 764a052 Bump golang.org/x/net from 0.8.0 to 0.17.0 (#1555)
* c911aeb Fix attachments being omitted from postback (#1557)
* 954ed45 Fix incorrect Slovak language code. Closes #1533.
* a61a9d8 Fix preference management logic to avoid unnecessary DB calls.
* 99c71a2 fix: update inlang settings (#1529)
* 82c3c68 Clean root URL of trailing slashes when updating settings.
* 04e571d Fix file fetch in attachments failing for signed URLs. Closes #1499.
* 8f2a08b Fix invalid suffix 'd' in timestring string in s3 expiry config.
* 11f90b2 Fix typo in i18n S3 expiry description.
* 5af6252 Fix make not picking up semver from git archive builds. Fixes #1380.
* 717a636 Add Sprig and other tpl functions to static templates as well. Closes #1527.
* 7019f26 Fix docs for public subscription api (#1522)
* 9423c74 Docker Multi Arch (esp. ARM) builds: Improving Build File (#1451)
* 2b95c88 Add Postmark bounce webhook support (refactor #1385) (#1485)
* e5ac111 Update installation.md - fly.io instructions not working (#1487)
* 34d86fc Update installation.md (#1494)
* 5664e5c fix: replace docker-compose with docker compose (#1490)
* 83c88d7 Escape search query in list search. Closes #1471.
* 16eeb94 added "tutorials" section and other minor edits (#1444)
* e317f2c Modify `sed` flag based on OS. Closes #1474.
* 25513b8 go: bump to 1.20 (#1479)
* eefcbc3 Fix hardcoded DB name in 'about' SQL query. Closes #1477.
* 52a7298 Update bounces.md (#1468)
* 6af904d Lowercase email search on UI to match lowercase email index in DB. Closes #1464.
* 07a9632 Update latest version on homepage.
* 4b05ab1 Add check for SES 'invalid domain' transient bounces. Closes #1463.
* e2f1313 Update configuration.md (#1465)
* fcdea60 Update bounces.md (#1466)
* 2888dcd Update upgrade.md (#1467)