Adds a Dockerfile and updates the README file

Dockerfile

@@ -0,0 +1,11 @@
+FROM node:alpine3.16
+
+RUN apk add git
+
+WORKDIR /app
+COPY . .
+RUN npm install && \
+    npm audit fix --force && \ 
+    npm install -g .
+
+ENTRYPOINT [ "ttf2woff" ]

README.md

@@ -1,5 +1,4 @@
-ttf2woff
-========
+# ttf2woff
 
 ttf2woff converts TTF fonts to WOFF format. That can be useful for different
 webfont generation tools.
@@ -8,30 +7,41 @@ This is node.js partial port of original woff CLI tools
 http://people.mozilla.com/~jkew/woff/
 
 
-Usage
------
+## Usage
 
-Install:
+### Install globally
 
 ``` bash
 npm install -g ttf2woff
 ```
 
-Usage example:
+### Usage example
 
 ``` bash
 ttf2woff fontello.ttf fontello.woff
 ```
 
+### Run in Docker
 
-Authors
--------
+As an alternative, the app can be run through Docker. First, the container image needs to be built, for instance:
+
+````bash
+$ docker build -t fontello/ttf2woff -f Dockerfile .
+````
+
+Now, the `ttf2woff` application can be run within a temporary Docker container with a mounted volume (to exchange the font files between the container and the host machine).
+
+````bash
+$ docker run --rm -v $(pwd)/fixtures/:/fonts fontello/ttf2woff /fonts/test.ttf /fonts/converted.woff
+````
+
+
+## Authors
 
 * Viktor Semykin <[email protected]>
 
 
-License
--------
+## License
 
 Copyright (c) 2013 [Vitaly Puzrin](https://github.com/puzrin).
 Released under the MIT license. See