[CONF] Add a template configuration for PostgREST

install/gargamelle/postgrest.conf

+db-uri = "postgres://authenticator:CHANGEME@127.0.0.1:5432/gargandb"
+db-schema = "api"
+db-anon-role = "anon"
+db-pool = 10
+
+server-host = "*4"
+server-port = 3000
+
+## base url for swagger output
+# server-proxy-uri = ""
+
+## choose a secret to enable JWT auth
+## (use "@filename" to load from separate file)
+jwt-secret = "Mw/q=efK3ai7}?}?!D68}a2.j}G5;1]ceI;OV1l=N^(-mH+%l="
+# secret-is-base64 = false
+
+## limit rows in response
+max-rows = 100
+
+## stored proc to exec immediately after auth
+# pre-request = "stored_proc_name"