Adjust dev files for borgbase/vorta.borgbase.com#32 (#1585)

* Add `pre-commit` to developer requirements.

* Add virtual python environments to `.gitignore`.

* Update pull request template.

---------

Co-authored-by: real-yfprojects <real-yfprojects@users.noreply.github.com>

.github/pull_request_template.md

@@ -36,7 +36,9 @@
 - [ ] All new and existing tests passed.
 
 
-*I provide my contribution under the terms of the [license](./../../LICENSE.txt) of this repository and I affirm the Developer Certificate of Origin.*
+*I provide my contribution under the terms of the [license](./../../LICENSE.txt) of this repository and I affirm the [Developer Certificate of Origin][dco].*
+
+[dco]: https://developercertificate.org/
 
 <!--
 This template is sourced from the awesome https://github.com/TalAter/open-source-templates

.gitignore

@@ -15,6 +15,11 @@ vorta.egg-info
 .vagrant
 *.log
 htmlcov
+# virtual python environments
+env
+venv
+.env
+.venv
 # Avoid adding translations of source language
 # Files are still used by Transifex
 src/vorta/i18n/ts/vorta.en.ts

requirements.d/dev.txt

@@ -1,3 +1,4 @@
+pre-commit
 black==22.*
 coverage
 flake8