cleanup and update README

Makefile

@@ -4,4 +4,4 @@ build:
 	podman build -t gitea.balki.me/balki/aur_builder:exp -t gitea.balki.me/balki/aur_builder:`date -I` .
 
 pull:
-	podman pull docker.io/archlinux:base-devel            
+	podman pull docker.io/archlinux:base-devel

README.md

@@ -1,13 +1,25 @@
+Build Archlinux packages in rootless podman container
 
+### Why
 
-Command to build
+1. `sudo` is run inside container (required for makepkg). Does not affect host system
+2. Does not install unnecessary make dependencies in host system
+3. Build runs in clean environment. 
+
+### Usage
+
+1. Remove/Replace mirror url. I run [pacoloco](https://github.com/anatol/pacoloco) locally at archmirror.i.balki.me
+2. Change PACKAGER setting to your name/email
+3. Add AUR dependencies in a folder `deps/` (if any)
+
+### Command to build
 
 ```
 cd ~/projects/mine/aur_builder/
 podman build -t gitea.balki.me/balki/aur_builder:exp .
 ```
 
-Command to run
+### Command to run
 
 ```
 cd /home/balki/gotosocial_aur/

makepkg.conf

@@ -1,10 +1,14 @@
 PACKAGER="Balakrishnan Balasubramanian <arch-pkger@balki.me>"
 
+# Do not build debug packages
+
 for index in "${!OPTIONS[@]}"; do
 	if [[ "${OPTIONS[$index]}" = *debug ]]; then
 		OPTIONS["$index"]="!debug"
 	fi
 done
 
+# Enables all extra features supported by host CPU
+
 CFLAGS="$CFLAGS -march=native -mtune=native"
 CXXFLAGS="$CFLAGS -Wp,-D_GLIBCXX_ASSERTIONS"