Merge pull request #2 from d4v3y0rk/add-dockerfile

Add dockerfile

Dockerfile

@@ -0,0 +1,9 @@
+FROM node:dubnium-buster-slim
+RUN apt-get update && apt-get install -y build-essential && rm -rf /var/lib/apt/lists/*
+
+COPY . /
+ENV NODE_OPTIONS="--max_old_space_size=2048"
+RUN npm install node-sass
+RUN npm install -g grunt-cli
+RUN npm i
+CMD grunt dev   

README.md

@@ -20,7 +20,6 @@ Cryptographic operations in CyberChef should not be relied upon to provide secur
 
 [A live demo can be found here][1] - have fun!
 
-
 ## How it works
 
 There are four main areas in CyberChef:
@@ -102,6 +101,17 @@ An installation walkthrough, how-to guides for adding new operations and themes,
  - Submit a pull request. If you are doing this for the first time, you will be prompted to sign the [GCHQ Contributor Licence Agreement](https://cla-assistant.io/gchq/CyberChef) via the CLA assistant on the pull request. This will also ask whether you are happy for GCHQ to contact you about a token of thanks for your contribution, or about job opportunities at GCHQ.
 
 
+## Running in Docker
+
+If you would like to run the app locally in docker please follow the steps below:
+
+```
+git clone https://github.com/gchq/CyberChef.git
+cd CyberChef
+docker build --tag cyberchef .
+docker run --rm --name cyberchef -it -p 8080:8080 cyberchef
+```
+
 ## Licencing
 
 CyberChef is released under the [Apache 2.0 Licence](https://www.apache.org/licenses/LICENSE-2.0) and is covered by [Crown Copyright](https://www.nationalarchives.gov.uk/information-management/re-using-public-sector-information/uk-government-licensing-framework/crown-copyright/).