Write bug report template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,49 @@
+---
+name: "\U0001F41E Bug report"
+about: Submit a bug report to help us improve torchgpipe
+
+---
+
+# 🐞 Bug
+A clear and concise description of what the bug is.
+
+## Code that reproduces
+```python
+# Paste here the code that reproduces the bug.
+# Keep the code compact to focus on the actual problem.
+```
+
+Paste here output from the above code:
+```
+```
+
+## Environment
+Run the below Python code and paste the output:
+```python
+import os, platform, torch, torchgpipe
+
+if torch.cuda.is_available():
+    print('GPU:', torch.cuda.get_device_properties(0))
+    print('Number of GPUs:', torch.cuda.device_count())
+    print('CUDA:', torch.version.cuda)
+    print('cuDNN:', torch.backends.cudnn.version())
+else:
+    print('No GPUs')
+
+print('Python:', platform.python_version())
+print('PyTorch:', torch.__version__)
+print('torchgpipe:', torchgpipe.__version__)
+
+try:
+    with open(os.path.join(torchgpipe.__path__[0], '../.git/HEAD')) as f:
+        print('torchgpipe.git:', f.read())
+except FileNotFoundError:
+    pass
+```
+
+Paste here:
+```
+```
+
+## Additional context
+Add any other context about the problem here.

CONTRIBUTING.md

@@ -1,8 +1,8 @@
 # Contributing to torchgpipe
 
 torchgpipe is currently under development. We will try to make it stable and
-usable. Until v0.1.0, which will be our first production release, we don't open
-up receiving issues or pull requests. Please wait for a while.
+usable. Until v0.1.0, which will be our first production release, we open up
+only bug reports, but not feature or pull requests. Please wait for a while.
 
 Kakao Brain, the project owner, has authority to update this guide.