Add README

README.md

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+# Mongo Replica Initializer
+
+### Usage
+
+1. Clone this repo
+```
+git clone https://forge.techtransthai.org/latenightdef/mongo-replica-initializer.git
+cd mongo-replica-initializer
+```
+
+2. Modify the top part of main.go to suit your needs
+```
+var mongoBasePath = "/opt/my-mongo"
+var replicasetName = "techtransthai-db"
+var networkName = "mongonet"
+var numberOfContainers int = 2
+var maxMemAllocPercent int = 80
+var mongoInitdbRootUsername = "sasha"
+var mongoInitdbRootPassword = "12345"
+```
+3. Build and run
+```
+go get
+go build
+sudo ./main
+# Or run in verbose mode
+sudo ./main -v
+# Or run in local IP mode, so you don't need directConnection=true
+sudo ./main -localip
+```