Added docker file for propmon

docs/proposalMonitor.md

@@ -14,4 +14,11 @@ yarn build
 ETH_RPC=<your ethereum rpc here> yarn propmon
 ```
 
-Then navigate to `localhost:8080/propMonUi/propMonUi.html` in a browser. You will need to wait around 30 seconds whilst the propmon discovers all proposals and their stages. The propmon creates a proposalStage.json file that contains a json representation of the data you see on the web page.
+Then navigate to `localhost:8080/propMonUi/propMonUi.html` in a browser. You will need to wait around 30 seconds whilst the propmon discovers all proposals and their stages. The propmon creates a proposalStage.json file that contains a json representation of the data you see on the web page.
+
+## Running with docker
+```
+docker build -t propmon -f propMon.Dockerfile .
+docker run -p 8080:8080 -e ETH_RPC=<your ethereum rpc here> propmon
+```
+Navigate to `localhost:8080/propMonUi/propMonUi.html`

propMon.Dockerfile

@@ -0,0 +1,17 @@
+# Dockerfile
+FROM node:16
+
+WORKDIR /app
+
+COPY package.json ./
+COPY yarn.lock ./
+
+RUN yarn install
+
+COPY . .
+
+RUN git submodule update --init --recursive 
+
+RUN yarn build
+
+CMD ["yarn", "propmon"]