add authrorization to npx and docker installation

docker/README.md

@@ -0,0 +1,24 @@
+# Flowise Docker Hub Image
+
+Starts Flowise from [DockerHub Image](https://hub.docker.com/repository/docker/flowiseai/flowise/general)
+
+## Usage
+
+1. Create `.env` file and specify the `PORT` (refer to `.env.example`)
+2. `docker-compose up -d`
+3. Open [http://localhost:3000](http://localhost:3000)
+4. You can bring the containers down by `docker-compose stop`
+
+## With Authrorization
+
+1. Create `.env` file and specify the `PORT`, `USERNAME`, and `PASSWORD` (refer to `.env.example`)
+2. Pass `USERNAME` and `PASSWORD` to the `docker-compose.yml` file:
+    ```
+    environment:
+        - PORT=${PORT}
+        - USERNAME=${USERNAME}
+        - PASSWORD=${PASSWORD}
+    ```
+3. `docker-compose up -d`
+4. Open [http://localhost:3000](http://localhost:3000)
+5. You can bring the containers down by `docker-compose stop`