Slackbot Doge is a serverless meme bot for Slack that utilizes and leverages the following Amazon Web Services : Amazon API, Amazon S3 Buckets, Amazon Lambda. Best of all, it is easy to install.

Create an Amazon S3 bucket that will contain all your user-generated memes. Download SlackBot Doge zip from Github and upload it to your Lambda function. Give your Lambda function access to your S3 resources by going to configuration->role->custom role and adding the following policy. Make sure to update the Resource to your own.

IAM Policy

{
    "Version": "2012-10-17",
    "Statement": [
    {
        "Sid": "Stmt1472400819800",
        "Action": "s3:*",
        "Effect": "Allow",
        "Resource": "arn:aws:s3:::slackbotdoge:*"
    },
    {
        "Effect": "Allow",
        "Action": [
            "logs:CreateLogGroup",
            "logs:CreateLogStream",
            "logs:PutLogEvents"
        ],
        "Resource": "arn:aws:logs:*:*:*"
    }
]
}

In the Amazon dashboard, navigate to Amazon API Gateway and click on Create API. Fill in some basic API information and then click Create API. Now create a new API GET method and set the integration type to Lambda Function. Make sure that the Lambda Region corresponds to your Lambdas region. If you have done everything correctly your Lambda function should automatically prepopulate. Then click save.

Now we are going to MAP Slacks request variables. Click on Integration Request->Body Mapping Templates->Add Mapping Template Put the following into the header type

application/x-www-form-encoded

and put the following into the template

{
#set($queryMap = $input.params().querystring)
#foreach( $key in $queryMap.keySet())
  "$key" : "$queryMap.get($key)"
  #if($foreach.hasNext),#end
#end
}

https://api.slack.com/slash-commands

Create a custom command for your team by going to https://<YOUR TEAM>.slack.com/apps/build and clicking on Make a Custom Integration->Slash Command. Choose a command and continue.

Continue filling out whatever information is necessary. For the URL field make sure to input your Amazon API Gateway API URL and for the Method select GET.

Everything should be working just fine. If you are running into any issues feel free to send me a tweet @notMiloBejda. SlackBot Doge repo can be found here : https://github.com/ListingPowerTools/slackbot-doge-serverless