Add Dockerfile for YaCy deployment

Dockerfile

@@ -0,0 +1,13 @@
+FROM openjdk:8-jdk-alpine
+
+# Set working directory
+WORKDIR /yacy
+
+# Copy the project files
+COPY . .
+
+# Expose YaCy port
+EXPOSE 8090
+
+# Start YaCy
+CMD ["sh", "startYACY.sh"]