Added Frequently Asked Questions page to docs (#319)

docs/faq.md

@@ -0,0 +1,16 @@
+# Frequently Asked Questions
+
+### White Pages
+
+Once the cloning is done and you try to serve the pages via snare, you might get all the white pages and nothing else. 
+
+In this scenario, there are two things to make sure of:
+
+1. You are using the latest code from the Snare repository.
+    - For extra measure, make sure to compare the versions in the requirement.txt on the remote main branch(https://github.com/mushorg/snare/tree/main) and the code you have.
+
+2. Make sure you have the tanner running properly.
+    - If you are using the public tanner instance i.e. tanner.mushmush.org:8090, make sure it is responding.
+    - If any Tanner instance is running properly, once you visit the Tanner URL in your browser you should see `Tanner Server` on the page.
+        - In most of the scenarios when Tanner isn't working properly snare might serve white pages instead of throwing any error.
+

docs/index.rst

@@ -13,7 +13,7 @@ SNARE
    quick-start
    parameters
    cloner
-
+   faq
 
 
 Indices and tables