docs: Adding README.md with basic examples and installation notes

README.md

@@ -0,0 +1,37 @@
+# ELBLOGCAT
+
+`elblogcat` is tool to list accesslogs for aws loadbalancers and cat them to see the content of them without need to download them local and cat them manual.
+
+## Installation
+
+### Manual installation - compile it
+
+- [Install go](https://golang.org/doc/install)
+- Set up `GOPATH` and add `$GOPATH/bin` to your `PATH`
+- Run `go get -u github.com/dbgeek/elblogcat`
+
+### Download github release 
+
+```sh
+curl https://github.com/dbgeek/elblogcat/releases/download/<release>/elblogcat_<release>_<os>_<arch>.tar.gz --out elblogcat_0.0.1-rc2_darwin_amd64.tar.gz
+```
+
+## Usage
+
+### list all accesslog with prefix
+
+```sh
+elblogcat list --aws-account-id 1234567890 --s3-prefix-bucket lb-bucket --s3-prefix team-xxx
+```
+
+### list all accesslog with without prefix
+
+```sh
+elblogcat list --aws-account-id 1234567890 --s3-prefix-bucket lb-bucket
+```
+
+### cat accesslog for one load-balancer between a timerange
+
+```sh
+elblogcat cat --load-balancer-id load-balancer-id --start-time "2019-03-03 11:00:00" --end-time "2019-03-03 12:00:00"
+```