Add a file to collect blog notes and migrations

BLOG.md

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+# Migrations
+
+All migrations go into a single file I'll creatively call `migrations`:
+
+    -- 1 up
+    CREATE TABLE IF NOT EXISTS pastes (
+             paste_id SERIAL PRIMARY KEY,
+           paste_body TEXT
+           );
+    
+    -- 1 down
+    DROP TABLE pastes;

migrations

@@ -0,0 +1,8 @@
+-- 1 up
+CREATE TABLE IF NOT EXISTS pastes (
+         paste_id SERIAL PRIMARY KEY,
+       paste_body TEXT
+       );
+
+-- 1 down
+DROP TABLE pastes;