feat: permissions, middleware authentication, migrations

projects/greenlight/migrations/000006_add_permissions.down.sql

@@ -0,0 +1,3 @@
+DROP TABLE IF EXISTS users_permissions;
+DROP TABLE IF EXISTS permissions;
+

projects/greenlight/migrations/000006_add_permissions.up.sql

@@ -0,0 +1,17 @@
+CREATE TABLE IF NOT EXISTS permissions (
+    id bigserial PRIMARY KEY,
+    code text NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS users_permissions (
+    user_id bigint NOT NULL REFERENCES users ON DELETE CASCADE,
+    permission_id bigint NOT NULL REFERENCES permissions ON DELETE CASCADE,
+    PRIMARY KEY (user_id, permission_id)
+);
+
+-- Add the two permissions to the table.
+INSERT INTO permissions (code)
+VALUES 
+    ('movies:read'),
+    ('movies:write');
+