Add script to create PostgreSQL user/database.

psql-create-db-user.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+read -rp "Database: " database
+
+read -rp "User: " user
+
+read -srp "Password: " password
+
+echo ""
+read -rp "Create database $database & user $user? [Y/n]: " answer
+
+if ! [[ $answer =~ ^(Y|y)?$ ]]; then
+    exit 1
+fi
+
+stmts=(
+    "CREATE USER $user PASSWORD '$password'"
+	"CREATE DATABASE $database WITH OWNER = $user"
+	"GRANT ALL ON DATABASE $database TO $user"
+)
+
+for stmt in "${stmts[@]}"; do
+    docker exec postgres psql -c "$stmt"
+done