README should be updated

[valonsejdini]

The Dropwizard instructions in the README should be updated to note that the
system property palantir.config.key_path must be set before running the DW app as otherwise you will end up with following error. Something like: java -Dpalantir.config.key_path=/path_of_key_file -jar your_dw_app.jar server config.yml , or some other means.

Caused by: java.nio.file.NoSuchFileException: var/conf/encrypted-config-value.key at sun.nio.fs.UnixException.translateToIOException(UnixException.java:86) at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102) at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107) at sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:214) at java.nio.file.Files.newByteChannel(Files.java:361) at java.nio.file.Files.newByteChannel(Files.java:407) at java.nio.file.Files.readAllBytes(Files.java:3152) at com.palantir.config.crypto.KeyFileUtils.keyWithTypeFromPath(KeyFileUtils.java:41) at com.palantir.config.crypto.KeyFileUtils.keyPairFromPath(KeyFileUtils.java:65) at com.palantir.config.crypto.KeyFileUtils.keyPairFromDefaultPath(KeyFileUtils.java:77) at com.palantir.config.crypto.KeyFileUtils.decryptUsingDefaultKeys(KeyFileUtils.java:33) ... 21 more

[Hau-Hau]

One more reason to update readme is fact that since v6.0.0 dropwizard commands has been decomissed.