chore: fix the plugin path and readme

Author: Amninder Kaur

Dockerfile

@@ -39,8 +39,9 @@ RUN if [ -d /app/flashmq/auth-plugin ]; then echo "auth-plugin directory copied
 RUN if [ -f /app/flashmq/auth-plugin/build.sh ]; then echo "build.sh found"; else echo "build.sh not found, exiting"; exit 1; fi
 RUN ./auth-plugin/build.sh
 # check if the build was successful
+RUN mkdir -p /etc/flashmq
 RUN if [ -f /app/flashmq/build-plugin-libcurl-Release/libplugin_libcurl.so ]; then echo "libplugin_libcurl.so found, copying to /app/flashmq"; else echo "libplugin_libcurl.so not found, exiting"; exit 1; fi
-RUN cp /app/flashmq/build-plugin-libcurl-Release/libplugin_libcurl.so /app/flashmq/libplugin_libcurl.so
+RUN cp /app/flashmq/build-plugin-libcurl-Release/libplugin_libcurl.so /etc/flashmq/libplugin_libcurl.so
 
 
 # Clone the FlashMQ repository

README.md

@@ -12,4 +12,14 @@ and install gdb debug servers in the container</br>
 ![Debug server](./images/debug-server.png)</br>
 Once the container is running launch your favourite editors debug launch config
 
+## Flash Config
+If `allow_anonymous:false` then the plugin will expect `username` field to be not NULL and automatically authenticate.
+Thus `plugin` config is not be required to be mentioned as its already loaded the config from the correct path. Make sure if its mentioned the the path is `etc/flashmq/libplugin_libcurl.so` to use the plugin built with `mqtt-broker-flashmq` image.
+The docker image places the custom Auth plugin at path  `etc/flashmq/libplugin_libcurl.so` and container will point to the plugin using the config from the image. 
+
+
+|ENV VARS| default|
+|---------|--------|
+| AUTH_PUBLICKEY| undefined|
+
 

flashmq.conf

@@ -1,3 +1,3 @@
 
 allow_anonymous false
-plugin /app/flashmq/libplugin_libcurl.so
+plugin /etc/flashmq/libplugin_libcurl.so