Update docs for docs.ohif.org

docs/essentials/troubleshooting.md

@@ -0,0 +1,20 @@
+# Troubleshooting
+
+## Common Problems
+
+Problem | Most Common Reasons
+--------|--------------------
+** Can't retrieve Study List over DICOMWeb** | 1. QIDO root URL is incorrect<br> 2. DICOM Web is not enabled on PACS
+** Can't retrieve Study List over DIMSE** | 1. PACS is not configured to allow connections from OHIF Meteor Server
+** Can't retrieve images** | 1. WADO Root URL is incorrect<br> 2. DICOM Web is not enabled on PACS<br> 3. HTTP Basic Authentication username and password are incorrect or not provided.
+
+## Debugging Steps
+### Can't retrieve Study List over DICOMWeb
+
+1. Check that you can query your PACS using an alternative DICOM Web client (e.g. cURL, or a Web Browser). If you cannot, then your PACS is configured incorrectly. Refer to the documentation of the image archive.
+2.
+
+
+### Can't retrieve Study List over DIMSE
+
+### Can't retrieve images