Created Exporting a chat with docker (markdown)

Exporting-a-chat-with-docker.md

@@ -0,0 +1,34 @@
+# Getting Docker (without docker account)
+To avoid having to register for a docker account.
+
+Retrieved from: https://github.com/docker/docker.github.io/issues/6910
+
+* Windows: https://download.docker.com/win/stable/Docker%20for%20Windows%20Installer.exe
+* OSX: https://download.docker.com/mac/stable/Docker.dmg
+
+Install and run so that Docker is active. No need to login or register.
+
+----
+# Installing the Docker Image
+
+Retrieve the docker image for DiscordChatExporter
+```docker pull tyrrrz/discordchatexporter```
+
+# Getting the output.
+
+## The command to run docker:
+
+```docker run --rm -v ${PWD}:/app/out  tyrrrz/discordchatexporter export -t "TOKEN" -c CHANNELID -f EXPORT_TYPE```
+
+## What each part means:
+* `-v ${PWD}:/app/out` - Puts the output in the current directly (mapping PWD to the internal /app/out folder).
+* `TOKEN` & `CHANNELID` - See [Obtaining-Token-and-Channel-IDs]
+* `EXPORT_TYPE` - One of these values:
+** PlainText - Output is plain text format.
+** HtmlDark - Output is in HTML with a dark background. (with links to images).
+** HtmlLight - Same with light background and dark text.
+** Csv - Output is in CSV format.
+
+## Output filename:
+
+```Direct Messages - USER NAME [CHANNELID].txt```