updated docs

README.md

@@ -7,6 +7,7 @@ This project was made to refresh my memory on websockets and on centralised hubs
 ![demo giphy](demo.gif)
 
 # Run
+> Must have go installed.
 ### Step 1: [Fork the repo](https://github.com/Lambels/drawing-app/fork).
 ### Step 2: Run the server.
 Mac/Linux
@@ -19,4 +20,20 @@ go run .
 ```
 ### Step 3: Open as many clients.
 Open the [index.html](client/index.html) file in your browser as done in the demo.
+> Note: Each client gets assigned a random and unique color.
+
+# Run (Docker)
+> Must have docker installed.
+### Step 1: Clone the repo
+### Step 2: Build the docker image from source:
+```
+docker build -t drawing-app ./path/to/dockerfile
+```
+### Step 3: Run a docker container:
+```
+docker run -p 8080:8080 drawing-app
+```
+> `Ctrl-c` to quit
+### Step 4: Open as many clients.
+Open the [index.html](client/index.html) file in your browser as done in the demo.
 > Note: Each client gets assigned a random and unique color.