Update issue templates

Author: tillahoffmann

.github/ISSUE_TEMPLATE/bug-or-unexpected-behavior.md

@@ -0,0 +1,35 @@
+---
+name: Bug or unexpected behavior
+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. What did you expect to happen? What happened instead?
+
+**To Reproduce**
+
+Provide a self-contained code snippet that illustrates the bug or unexpected behavior. Ideally, send a Pull Request to illustrate with a test that illustrates the problem.
+
+```python
+raise RuntimeError("something went wrong")
+```
+
+**Runtime environment**
+
+Provide a summary of your runtime environment. Which operating system, python version, and docker version are you using? What is the version of `testcontainers-python` you are using? You can run the following commands to get the relevant information.
+
+```bash
+# Get the operating system information (on a unix os).
+$ uname -a
+# Get the python version.
+$ python --version
+# Get the docker version and other docker information.
+$ docker info
+# Get all python packages.
+$ pip freeze
+```