refactor(Dockerfile): modify entrypoint

source folders:
    - src from student
    - test from professor

libraries:
    - modocot libs dir
    - libs folder in professor repo

Dockerfile

@@ -19,4 +19,4 @@ add https://repo1.maven.org/maven2/org/opentest4j/opentest4j/1.2.0/opentest4j-1.
 
 workdir /modocot
 
-entrypoint java -Djava.security.egd=file:/dev/./urandom -jar /modocot/app.jar "$MODOCOT_SOURCEDIR:$MODOCOT_TESTDIR" "$MODOCOT_LIBSDIR/*" $MODOCOT_RESULTDIR
+entrypoint java -Djava.security.egd=file:/dev/./urandom -jar /modocot/app.jar "$MODOCOT_SOURCEDIR/src:$MODOCOT_TESTDIR/test" "$MODOCOT_LIBSDIR/*:$MODOCOT_TESTDIR/libs/*" $MODOCOT_RESULTDIR