more info to readme and fixes

README.md

@@ -4,6 +4,12 @@
 This is an HTTP API which provides information on the x509 certificates deployed on TLS sites. 
 You can self-host this yourself, however you're more than welcome to use the public API at https://certapi.libraryofcode.org/
 
+### Installation
+Run `make` to build the binary. It'll be installed in `build/certificateapi`. Simply run this executable.
+#### Environment Variables
+By default, the application listens on port `8080`. You can change this by setting the `PORT` environment variable to what you want.
+When running in production, set this environment variable: `GIN_MODE=release`
+
 ### How to Query
 Send a GET request to `https://certapi.libraryofcode.org` with the query parameter `q` set to equal the site you wish to dial.
 Ex: `https://certapi.libraryofcode.org/?q=www.google.com`

cmd/main.go

@@ -10,5 +10,5 @@ func main() {
 
 	router.GET("/", routes.GetCertificateInfo)
 
-	router.Run(":3030")
+	router.Run()
 }