init post-service

services/post-service/internal/postgres/migrations/000001_initialise_db.up.sql

@@ -0,0 +1,9 @@
+CREATE TABLE posts (
+    "id" serial PRIMARY KEY,
+    "panel_id" varchar(64) NOT NULL,
+    "author_id" varchar(64) NOT NULL,
+    "title" varchar(512) NOT NULL,
+    "content" TEXT NOT NULL,
+    "created_at" timestamp NOT NULL DEFAULT timezone('utc', now()),
+    "updated_at" timestamp
+);