Add readme and licence

LICENCE

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+MIT License
+
+Copyright (c) 2018 brmlab
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

readme.md

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+# Wekan mailer
+
+## About
+
+This is small application which provides email to board function for wekan.
+It is supposed to run in docker compose alongside [wekan+mongodb](https://github.com/wekan/wekan-mongodb), but may be used separately as it is Java based.
+**The application is currently WIP, use at your own risk!**
+
+## Functions
+
+- read emails from single SMTP server account
+- create card from received email on single wekan board in target list
+
+*Note: These are just starting functions, other may or may not be added later.*
+
+## Configuration
+
+The configuration is passed to the wekan-mailer trough environment variables simmilar to the approach in wekan+mongodb is compose used.
+
+### Wekan
+
+Required env vars are:
+
+- `WEKAN_URL`=http://localhost:3000
+- `WEKAN_USER`=someuser
+- `WEKAN_PASSWORD`=somepass
+- `WEKAN_TARGET_BOARD`=someId
+- `WEKAN_TARGET_LIST`=someListId
+
+```env
+WEKAN_URL=http://localhost:3000
+WEKAN_USER=someuser
+WEKAN_PASSWORD=somepass
+WEKAN_TARGET_BOARD=someId
+WEKAN_TARGET_LIST=someListId
+```