.. _dev_faq: ************************** Contributing & Development ************************** What versions does this FAQ concern? ------------------------------------ This FAQ concerns only EmbassyOS version 0.3.0 and above. For v0.2.x documentation, please see our :ref:`Service Packaging Guide `. What language does the application I want to package need to be written in? --------------------------------------------------------------------------- The application can be written in any language, so you may prefer to select an application in a language you are comfortable with (or write your own application). It is only important that the packaging specifications be followed. What considerations go into selecting an application to package? ---------------------------------------------------------------- With sufficient effot, most any software with the ability to be self-hosted could make its way onto EmbassyOS. That being said, the following features will make service packaging much easier: - Already built with self-hosting in mind - Active development - Built-in tor support - Already 'dockerized' Which possible formats can I use to write the :code:`manifest`, :code:`config_spec`, and :code:`config_rules` files? ------------------------------------------------------------------------------------------------------------------- JSON, TOML, or YAML are valid options. I'm getting errors on the `embassy-sdk pack` step. What's going on? -------------------------------------------------------------------- There is something either missing or incorrect in regard to one of the :code:`manifest`, :code:`configs`, :code:`instructions`, or :code:`icon` files.