updating readme

Author: Chadiii

README.md

@@ -1 +1,89 @@
 # Flagship Module for Nginx
+
+Adds the ability to feature management in web server level.
+
+## Build
+
+To link statically against nginx, cd to nginx source directory and execute:
+
+    ./configure --with compat --add-module=/path/to/flagship-nginx-module --with-pcre
+
+To compile as a dynamic module (nginx 1.9.11+), use:
+  
+	./configure --with compat --add-dynamic-module=/path/to/flagship-nginx-module --with-pcre
+
+In this case, the `load_module` directive should be used in nginx.conf to load the module.
+
+## Configuration
+
+### fs_init
+* **syntax**: `fs_init 'env_id' 'api_key' 'polling_interval' 'log_level';`
+* **default**: `none`
+* **context**: `server`
+
+Initialize the SDK with 4 arguments : Environment id, Api Key, Polling Interval and Log level.
+Once the initialization is done the 1st time, the second you execute the script it will bypass the initialization.
+
+### set_visitor_id
+* **syntax**: `set_visitor_id 'visitor_id';`
+* **default**: `none`
+* **context**: `location`
+
+Set the visitor id
+
+### set_visitor_context
+* **syntax**: `set_visitor_context 'visitor_context';`
+* **default**: `none`
+* **context**: `location`
+
+Set the visitor context
+
+### get_all_flags
+* **syntax**: `get_all_flags;`
+* **default**: `none`
+* **context**: `location`
+
+Execute the function getAllFlags that return the flags based on visitor id and context but does not return it in nginx it rather store it in variable named fs_sdk_cache_var that you can use as a key/value in nginx cache table for feature management.
+Note that you have to initialize the sdk and setting visitor id and context before running get_all_flags directive.
+
+
+## Sample configuration
+```
+http {
+    
+	server {
+        
+        fs_init 'env_id' 'api_key' 'polling_interval' 'log_level';
+        
+        location /test {
+            set_visitor_id 'visitor_id_test';
+		    set_visitor_context 'visitor_context_test';
+		    get_all_flags;
+
+            echo $fs_sdk_cache_var;
+        }
+
+        location /experiment {
+            set_visitor_id 'visitor_id_experiment';
+		    set_visitor_context 'visitor_context_experiment';
+		    get_all_flags;
+
+            echo $fs_sdk_cache_var;
+        }
+	}
+```
+this module uses Go wrapper for C, which is based on the Go SDK that implement bucketing mode.
+
+so the return on /test if we set visitor_id_test & visitor_context_test match isVip: false, will be:
+```
+isVip:false;
+```
+and the return on /experiment if we set visitor_id_experiment & visitor_context_experiment match isVip: true, will be:
+```
+isVip:true;
+```
+
+
+
+## Copyright & License
+