PR template, basic docs (lowcoder-org#133)

* ci: pull request template

* docs: high-level diagram for architecture

* chore: stacks should be ignored if provisioned locally

Author: falnyr

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,25 @@
+## Proposed changes
+Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request.   
+If it fixes a bug or resolves a feature request, be sure to link to that issue.
+
+## Types of changes
+What types of changes does your code introduce to Lowcoder?  
+_Put an `x` in the boxes that apply._
+
+- [ ] Bugfix (non-breaking change which fixes an issue)
+- [ ] New feature (non-breaking change which adds functionality)
+- [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Documentation Update (if none of the other choices apply)
+
+## Checklist
+You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! 
+This is simply a reminder of what we are going to look for before merging your code.  
+_Put an `x` in the boxes that apply._
+
+- [ ] Lint and unit tests pass locally with my changes
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] I have added necessary documentation (if appropriate)
+- [ ] Any dependent changes have been merged and published in downstream modules
+
+## Further comments
+If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc.

.gitignore

@@ -1,4 +1,5 @@
 .idea/
 logs/
+stacks/
 client/.yarn/cache/*.zip
 server/node-service/.yarn/cache/*.zip