Create bug.md

.github/ISSUE_TEMPLATE/bug.md

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+---
+name: Bug report
+about: File a bug report in OJS, OMP or OPS. Try our support forum linked below if you can't provide reproduction steps and technical specifications.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+Please tell us what happens, what you expected to happen, and why you think it is a bug in the software.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**What application are you using?**
+ OJS, OMP or OPS version X.X.X
+
+**Additional information**
+Please add any screenshots, logs or other information we can use to investigate this bug report.