Add Docker File

Dockerfile

+FROM openjdk:8-jdk-alpine
+
+LABEL maintainer="Wagner Franchin"
+
+ENV WEBPATH=/webserver/
+ENV WEBSERVER="WebServerHttp"
+
+RUN apk update && apk add ca-certificates wget && update-ca-certificates
+
+RUN mkdir -p $WEBPATH
+COPY src/main/java/ $WEBPATH
+WORKDIR $WEBPATH
+
+RUN javac *.java task/*.java
+
+EXPOSE 8000
+
+CMD java $WEBSERVER
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