Added standalone installation

Resolves #27

.env.example

@@ -0,0 +1,24 @@
+# DB Type: sqlite, mysql, postgresql, cockroachdb
+# Default if not set: sqlite
+#SPOOLMAN_DB_TYPE=sqlite
+
+# DB Setup, if not using sqlite
+#SPOOLMAN_DB_HOST=
+#SPOOLMAN_DB_PORT=
+#SPOOLMAN_DB_NAME=
+#SPOOLMAN_DB_USERNAME=
+#SPOOLMAN_DB_PASSWORD_FILE=
+#SPOOLMAN_DB_PASSWORD=
+#SPOOLMAN_DB_QUERY=
+
+# Logging level: DEBUG, INFO, WARNING, ERROR, CRITICAL
+# Default if not set: INFO
+#SPOOLMAN_LOGGING_LEVEL=INFO
+
+# Automatic nightly backup for SQLite databases
+# Default if not set: TRUE
+#SPOOLMAN_AUTOMATIC_BACKUP=TRUE
+
+# Host and port to listen on
+SPOOLMAN_HOST=0.0.0.0
+SPOOLMAN_PORT=7912