Update Dockerfile

Author: ivchicano

vscode4teaching-server/Dockerfile

@@ -1,5 +1,5 @@
 FROM openjdk:8-jdk-alpine
-COPY ./target/vscode4teaching-server-0.1.0-SNAPSHOT.jar /app/vscode4teaching-server-0.1.0.jar
+COPY ./target/vscode4teaching-server-0.1.0.jar /app/vscode4teaching-server-0.1.0.jar
 COPY ./docker/waitDB.sh /app/waitDB.sh
 EXPOSE 8080
 RUN ["chmod", "+x", "/app/waitDB.sh"]