Include makefile target for building septa.1 manpage and installing it.

makefile

@@ -1,8 +1,10 @@
-.PHONY: all clean pull get build build-in-container image test test-in-container install install-local
+.PHONY: all clean pull get build build-in-container image test test-in-container install install-local gh-release install-manpages build-manpages install-mango-doc
 
 GOLANG := golang:1.19
 GOOS := darwin
 
+VERSION ?= 1.7.0
+
 all: clean pull test build
 
 clean:
@@ -38,3 +40,12 @@ image: build
 # gh-release creates a new release in github and uploads the built binary.
 gh-release:
 	gh release create ${VERSION} 'bin/septa.zip'
+
+install-mango-doc:
+	go install github.com/dherbst/mango-doc@latest
+
+build-manpages:
+	cd cmd/septa && mango-doc -version ${VERSION} > ../../man/septa.1
+
+install-manpages:
+	sudo cp man/septa.1 /usr/local/share/man/man1/

man/septa.1

@@ -1,5 +1,5 @@
 .\"    Automatically generated by mango(1)
-.TH "septa" 1 "2023-12-29" "version 1.8.0" "User Commands"
+.TH "septa" 1 "2023-12-29" "version 1.7.0" "User Commands"
 .SH "NAME"
 septa \- a command line tool to use the septa API to get information about SEPTA transportation.
 .SH "SYNOPSIS"