📝 Docs: Add Quadlets and small changes to README

Yay for Quadlets!

quadlets/notatio.container

@@ -0,0 +1,17 @@
+[Install]
+WantedBy=default.target
+
+[Unit]
+Requires=postgres.service
+After=postgres.service
+
+[Container]
+AutoUpdate=registry
+ContainerName=notatio
+EnvironmentFile=.env
+Exec=./wait-for-postgres.sh postgres '${PGPORT}' ./notatio
+Image=docker.io/notatio/notatio
+Network=notatio.network
+PublishPort=9991:9991
+Volume=./notatio_uploads:/uploads:Z
+Volume=./editor_templates:/editor_templates:Z

quadlets/notatio.network

@@ -0,0 +1,5 @@
+[Install]
+WantedBy=default.target
+
+[Network]
+NetworkName=notatio-network

quadlets/postgres.container

@@ -0,0 +1,8 @@
+[Install]
+WantedBy=default.target
+
+[Container]
+ContainerName=postgres
+EnvironmentFile=.env
+Image=docker.io/library/postgres
+Network=notatio.network