docs: add docs link to readme, plus full logo url

README.md

@@ -1,4 +1,4 @@
-![](images/hot_logo.png)
+![](https://github.com/hotosm/fmtm/blob/main/images/hot_logo.png?raw=true)
 
 [![All Contributors](https://img.shields.io/github/all-contributors/hotosm/fmtm?color=ee8449&style=flat-square)](#contributors-)
 
@@ -16,6 +16,8 @@
 
 # Field Mapping Tasking Manager (FMTM)
 
+🕮 [Documentation](https://hotosm.github.io/fmtm/)
+
 A project to provide tools for Open Mapping campaigns
 
 While we have pretty good field mapping applications, we don’t have great tools to coordinate field mapping. However, we have most of the elements needed to create a field mapping-oriented version of the HOT Tasking Manager, which allows people to select specific areas and complete tasks in a coordinated, organized fashion.