Update README.md

Author: Tomas-Pytel

README.md

@@ -1,2 +1,59 @@
-# fastapi-featureflags
-FastAPI Feature Flags
+# FastAPI Feature Flags
+
+Very simple implementation of feature flags for FastAPI.  
+- Minimum configuration required. 
+- No unnecessary dependencies
+- Does its job
+
+## Installing
+To install the package from pip, first run:
+```bash
+pip install -U https://github.com/Pytlicek/fastapi-featureflags
+```
+
+## Usage
+A simple example of feature flags:
+```
+from fastapi_featureflags import FeatureFlags, feature_flag, feature_enabled
+
+my_ff = FeatureFlags(conf_from_url="https://pastebin.com/raw/4Ai3j2DC")
+print("Enabled Features:", my_ff.get_features())
+
+
+@feature_flag("web_1")
+def web_1_enabled():
+    print("Feature Should be enabled: web_1")
+
+web_1_enabled()
+
+if feature_enabled("web_2"):
+    print("Feature Should be disabled: web_2")
+```
+
+You can get FF (feature flags) from a file or URL:
+```
+FeatureFlags(conf_from_url="https://pastebin.com/raw/4Ai3j2DC")
+FeatureFlags(conf_from_json="tests/features.json")
+```
+There is also a handler that recognizes if the "@feature_flag" wrapper is used and the flag is not registered in the config. 
+This way you can also use FF at runtime. Defaults to False, so it's safer if you forget the feature flag in the code.
+
+Function `get_features` returns a list of all registered FF  
+You can enable or disable functions on the fly with `enable_feature` or `enable_feature`  
+
+When needed you can reload all feature flags with `reload_feature_flags`, 
+this is handy when you want to read and change features from URL fe.
+
+For non-production testing, is there a router available, 
+so you can see the paths in swagger-ui docs.
+Use `include_in_schema=False` when defining the router for public deployments
+```
+from fastapi_featureflags import router as ff_router
+app.include_router(ff_router)
+```
+
+### TODO
+- Tests
+- Better rewrite of the main class 
+- Packaging
+- FF from environments