Add ReMemory

[kokomo123]

I think this will make a fine addition to the self hosted list, as with the other dead man's switch needing to mature first. This is fully self hostable as a server component.

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Please fill out information below (all fields are mandatory unless noted otherwise):

# software name
name: "ReMemory"
# URL of the software project's homepage
website_url: "https://eljojo.github.io/rememory/"
# URL where the full source code of the program can be downloaded
source_code_url: "https://github.com/eljojo/rememory"
# description of what the software does, shorter than 250 characters, sentence case
description: "A digital safe with multiple keys, held by people you trust."
# list of license identifiers, see https://github.com/awesome-selfhosted/awesome-selfhosted-data/blob/master/licenses.yml for the full list of licenses
licenses:
  - Apache-2.0
# list of languages/platforms, see https://github.com/awesome-selfhosted/awesome-selfhosted-data/tree/master/platforms for the full list of platforms
platforms:
  - Shell
  - Docker
# list of tags (categories), see https://github.com/awesome-selfhosted/awesome-selfhosted-data/tree/master/tags for the full list of tags
tags:
  - Miscellaneous

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