README.md updated

README.md

@@ -1,2 +1,28 @@
 # javafx
 Docker base image for JavaFX development
+
+## Environment Variables:
+- `DISPLAY`: It use to sepecify the display server.
+
+## How to use?
+### Using Docker:
+- Create `Dockerfile`
+```
+# Builder stage
+FROM techthinkerorg/javafx:version as builder
+
+RUN mkdir /src
+WORKDIR /src
+COPY . /src/
+RUN ./gradlew build
+
+# Executable stage
+FROM techthinkerorg/javafx:version
+RUN mkdir /app
+WORKDIR /app
+COPY --from=builder /src/build/libs/your-app-with-version.jar /app/app.jar
+
+CMD java -Dprism.order=sw -jar /app/app.jar
+```
+- Run `docker build  -f ./Dockerfile -t your-image-name .`
+- Run `docker run your-image-name`