Created Using MySQL Backend (markdown)

Using-MySQL-Backend.md

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+To use the MySQL backend, first ensure you build the binary [with MySQL feature enabled](https://github.com/dani-garcia/bitwarden_rs/wiki/Building-binary#mysql-backend).
+
+To run the binary or container ensure the ```DATABASE_URL``` environment variable is set (i.e. ```DATABASE_URL='mysql://<user>:<password>@mysql/bitwarden```).
+
+Example using docker
+```
+# Start a mysql container
+docker run --name mysql --net <some-docker-network>\
+ -e MYSQL_ROOT_PASSWORD=<my-secret-pw>\
+ -e MYSQL_DATABASE=bitwarden\
+ -e MYSQL_USER=<bitwarden_user>\
+ -e MYSQL_PASSWORD=<bitwarden_pw> -d mysql:5.7
+
+# Start bitwarden_rs with MySQL Env Vars set.
+docker run -d --name bitwarden --net <some-docker-network>\
+ -v $(pwd)/bw-data/:/data/ -v <Path to ssl certs>:/ssl/\
+ -p 443:80 -e ROCKET_TLS='{certs="/ssl/<your ssl cert>",key="/ssl/<your ssl key>"}'\
+ -e RUST_BACKTRACE=1 -e DATABASE_URL='mysql://<bitwarden_user>:<bitwarden_pw>@mysql/bitwarden'\
+ -e ADMIN_TOKEN=<some_random_token_as_per_above_explanation>\
+ -e ENABLE_DB_WAL='false' <you bitwarden image name>
+```