Install README in PKGBUILD

Install README.md to /usr/share/doc, bump pkgrel to 2 and quote variables.

PKGBUILD

@@ -5,8 +5,8 @@
 pkgname=simple_backup
 pkgdesc='Simple backup script that uses rsync to copy files'
 pkgver=4.4.0
-pkgrel=1
-url="https://git.shouldnt.work/fuxino/${pkgname}"
+pkgrel=2
+url="https://git.shouldnt.work/fuxino/$pkgname"
 arch=('any')
 license=('GPL-3.0-or-later')
 makedepends=('git'
@@ -22,26 +22,27 @@ checkdepends=('python-pytest'
               'python-paramiko'
               'openssh')
 conflicts=('simple_backup-git')
-source=(git+${url}?signed#tag=${pkgver})
+source=("git+$url?signed#tag=$pkgver")
 validpgpkeys=('7E12BC1FF3B6EDB2CD8053EB981A2B2A3BBF5514')
 sha256sums=('cc5944558ed4bc30a0d1a00b49dfced371909dd6c4f39b0c1ccf8f39b445e907')
 
 build()
 {
-    cd ${srcdir}/${pkgname}
+    cd "$srcdir"/"$pkgname"
     python -m build --wheel --no-isolation
 }
 
 check()
 {
-    cd ${srcdir}/${pkgname}
+    cd "$srcdir"/"$pkgname"
     python -m pytest
 }
 
 package()
 {
-    cd ${srcdir}/${pkgname}
-    python -m installer --destdir=${pkgdir} dist/*.whl
-    install -Dm644 ${pkgname}/${pkgname}.conf ${pkgdir}/usr/share/doc/${pkgname}/${pkgname}.conf
-    install -Dm644 man/${pkgname}.1 ${pkgdir}/usr/share/man/man1/${pkgname}.1
+    cd "$srcdir"/"$pkgname"
+    python -m installer --destdir="$pkgdir" dist/*.whl
+    install -Dm644 "$pkgname"/"$pkgname".conf "$pkgdir"/usr/share/doc/"$pkgname"/"$pkgname".conf
+    install -Dm644 README.md "$pkgdir"/usr/share/doc/"$pkgname"/README.md
+    install -Dm644 man/"$pkgname".1 "$pkgdir"/usr/share/man/man1/"$pkgname".1
 }