add contributing docs (#182)

Author: clickingbuttons

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,37 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+<!---
+A clear and concise description of what the bug is.
+-->
+
+**To Reproduce**
+<!---
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+-->
+
+**Expected behavior**
+<!---
+A clear and concise description of what you expected to happen.
+-->
+
+**Screenshots**
+<!---
+If applicable, add screenshots to help explain your problem.
+-->
+
+**Additional context**
+<!---
+Add any other context about the problem here.
+-->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,28 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+<!---
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+-->
+
+**Describe the solution you'd like**
+<!---
+A clear and concise description of what you want to happen.
+-->
+
+**Describe alternatives you've considered**
+<!---
+A clear and concise description of any alternative solutions or features you've considered.
+-->
+
+**Additional context**
+<!---
+Add any other context or screenshots about the feature request here.
+-->

README.md

@@ -14,3 +14,11 @@ Requires Python >= 3.8.
 ## Getting started
 See the [Getting Started](https://polygon-api-client.readthedocs.io/en/latest/Getting-Started.html)
 section in our docs or view the [examples](./examples) directory.
+
+# Contributing
+
+For now, we're generally not accepting pull requests from outside contributors
+but we're open to bug reports and feature requests. Or if you have more general
+feedback, feel free to reach out on
+our [Slack channel](https://polygon.io/contact).
+