fix db column names

Signed-off-by: Tobias Erbshäußer <tobias@tesoft.dev>

backend/db.go

@@ -118,7 +118,7 @@ func (db *Database) CreateBlogArticle() (int64, func(*Article) error, error) {
 
 		for _, file := range article.Files {
 			_, err = tx.Exec(
-				"INSERT INTO blog_file(id, articleId, data) VALUES (?, ?, ?)",
+				"INSERT INTO blog_file(id, article_id, data) VALUES (?, ?, ?)",
 				file.Id,
 				id,
 				file.Data,
@@ -284,10 +284,10 @@ func createV1Tables(tx *sql.Tx, rootPassword string) error {
 		);
 		CREATE TABLE blog_file(
 		    id INTEGER NOT NULL,
-		    articleId INTEGER NOT NULL,
+		    article_id INTEGER NOT NULL,
 		    data BLOB NOT NULL,
-		    PRIMARY KEY(id, articleId),
-		    FOREIGN KEY(articleId) REFERENCES blog_article(id)
+		    PRIMARY KEY(id, article_id),
+		    FOREIGN KEY(article_id) REFERENCES blog_article(id)
 		);
 	`, salt, rootPasswordHash[:])
 	if err != nil {